Prove that there are an infinite number of distinct ordered pairs (m, n) of integers such that, for every positive integer t, the number mt + n is a triangular number if and only if t is a triangular number as well

(In reply to What's a triangular number? by Bryan)

<<Guess I need to get more active voting on the puzzle queue... >>

Perhaps. But maybe hitting the books a bit first would better equip you to deal with such arcane concepts as triangular numbers, and multisets.

Posted by Richard on 2004-10-26 18:27:19