Happy New Year!

January 1, 2016

The triangular numbers (A000217) are those numbers that can be formed by identical objects arranged in a triangle. For instance, 10 bowling pins can be formed in a triangle with sides of length 4, so the fourth triangular number is 10.

Your task is to write a program that computes the n th triangular number; what is the 63rd triangular number? When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.


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