Given an integer N, the task is to check if it is an Icositrigonal number or not.
Icositrigonal number is a class of figurate number. It has 23 – sided polygon called Icositrigon. The N-th Icositrigonal number count’s the 23 number of dots and all others dots are surrounding with a common sharing corner and make a pattern. The first few Icositrigonol numbers are 1, 23, 66, 130, 215, 321, 448 …
Input: N = 23
Second icositrigonal number is 23.
Input: N = 30
- The Kth term of the icositrigonal number is given as
- As we have to check that the given number can be expressed as a icositrigonal number or not. This can be checked as follows –
- Finally, check the value of computed using this formulae is an integer, which means that N is a icositrigonal number.
Below is the implementation of the above approach:
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