Project Euler/61

Problem Statement

This problem explores an extension of the concept of a triangular number, generated by the formula $ \dfrac{n(n+1)}{2} $, to other shapes.

Exploring triangle, square, pentagonal, hexagonal, heptagonal, and octagonal numbers - numbers that are generated according to particular formulae:

$ P_{3,n} = \dfrac{n(n+1)}{2} $

$ P_{4,n} = n^2 $

$ P_{5,n} = \dfrac{n(3n-1)}{2} $

$ P_{6,n} = n(2n-1) $

$ P_{7,n} = \dfrac{n(5n-3)}{2} $

$ P_{8,n} = n(3n-2) $

Link: https://projecteuler.net/problem=61

Code

https://charlesreid1.com:3000/cs/euler/src/master/scratch/Round2_050-070/061