In the previous article, we have discussed Python Program to Print Series 0, 2, 8, 14, 24, 34 …N

Given a number N and the task is to print the series** (1 9 17 33 49 73 97 …N)** till the given number N in Python.

**Examples:**

**Example1:**

**Input:**

Given Number = 8

**Output:**

The above series till the given number{ 8 } is : 1 9 17 33 49 73 97 129

**Example2:**

**Input:**

Given Number = 4

**Output:**

The above series till the given number{ 4 } is : 1 9 17 33

## Program to Print Series 1 9 17 33 49 73 97 …N in Python

Below are the ways to print the series** (1 9 17 33 49 73 97 …N)** till the given number N in Python:

### Method #1: Using While Loop (Static Input)

**Approach:**

- Give the number N as static input and store it in a variable.
- Take a variable to say
**itr**and initialize its value to 1. - Take another variable say
**previous_val**and initialize its value to 0. - Loop until the above-declared variable itr value is less than or equal to the given number using the while loop.
- Inside the loop, check if the above itr value is even or not using the if conditional statement.
- If it is true, calculate the value of 2 multiplied with the above itr value raised to the power 2 using the pow() function.
- Store it in a variable.
- Add 1 to the above result and store it in the same variable
**previous_val.** - Print the value of the above previous_val separated by spaces.
- If it is false, calculate the value of 2 multiplied with the above itr value raised to the power 2 using the pow() function.
- Store it in another variable.
- Subtract 1 from the above result and store it in the same variable
**previous_val.** - Print the value of the above previous_val separated by spaces.
- Increment the above
**itr**value by 1. - The Exit of the Program.

**Below is the implementation:**

# Give the number N as static input and store it in a variable. gvn_numb = 8 # Take a variable to say itr and initialize its value to 1. itr = 1 # Take another variable say previous_val and initialize its value to 0. previous_val = 0 # Loop until the above-declared variable itr value is less than or equal to the # given number using the while loop. print("The above series till the given number{", gvn_numb, "} is :") while itr <= gvn_numb: # Inside the loop, check if the above itr value is even or not using the if # conditional statement. if(itr % 2 == 0): # If it is true, calculate the value of 2 multiplied with the above itr value raised # to the power 2 using the pow() function. # Store it in a variable. k = 2*pow(itr, 2) # Add 1 to the above result and store it in the same variable previous_val. previous_val = k+1 # Print the value of the above previous_val separated by spaces. print(previous_val, end=" ") else: # If it is false, calculate the value of 2 multiplied with the above itr value raised # to the power 2 using the pow() function. # Store it in another variable. l = 2*pow(itr, 2) # Subtract 1 from the above result and store it in the same variable previous_val. previous_val = l - 1 # Print the value of the above previous_val separated by spaces. print(previous_val, end=" ") # Increment the above itr value by 1. itr += 1

**Output:**

The above series till the given number{ 8 } is : 1 9 17 33 49 73 97 129

### Method #2: Using While loop (User Input)

**Approach:**

- Give the number N as user input using the int(input()) function and store it in a variable.
- Take a variable to say
**itr**and initialize its value to 1. - Take another variable say
**previous_val**and initialize its value to 0. - Loop until the above-declared variable itr value is less than or equal to the given number using the while loop.
- Inside the loop, check if the above itr value is even or not using the if conditional statement.
- If it is true, calculate the value of 2 multiplied with the above itr value raised to the power 2 using the pow() function.
- Store it in a variable.
- Add 1 to the above result and store it in the same variable
**previous_val.** - Print the value of the above previous_val separated by spaces.
- If it is false, calculate the value of 2 multiplied with the above itr value raised to the power 2 using the pow() function.
- Store it in another variable.
- Subtract 1 from the above result and store it in the same variable
**previous_val.** - Print the value of the above previous_val separated by spaces.
- Increment the above
**itr**value by 1. - The Exit of the Program.

**Below is the implementation:**

# Give the number N as user input using the int(input()) function and # store it in a variable. gvn_numb = int(input("Enter some Random Number = ")) # Take a variable to say itr and initialize its value to 1. itr = 1 # Take another variable say previous_val and initialize its value to 0. previous_val = 0 # Loop until the above-declared variable itr value is less than or equal to the # given number using the while loop. print("The above series till the given number{", gvn_numb, "} is :") while itr <= gvn_numb: # Inside the loop, check if the above itr value is even or not using the if # conditional statement. if(itr % 2 == 0): # If it is true, calculate the value of 2 multiplied with the above itr value raised # to the power 2 using the pow() function. # Store it in a variable. k = 2*pow(itr, 2) # Add 1 to the above result and store it in the same variable previous_val. previous_val = k+1 # Print the value of the above previous_val separated by spaces. print(previous_val, end=" ") else: # If it is false, calculate the value of 2 multiplied with the above itr value raised # to the power 2 using the pow() function. # Store it in another variable. l = 2*pow(itr, 2) # Subtract 1 from the above result and store it in the same variable previous_val. previous_val = l - 1 # Print the value of the above previous_val separated by spaces. print(previous_val, end=" ") # Increment the above itr value by 1. itr += 1

**Output:**

Enter some Random Number = 4 The above series till the given number{ 4 } is : 1 9 17 33

If you are learning Python then the Python Programming Example is for you and gives you a thorough description of concepts for beginners, experienced programmers.