In the sequence $ (a_n)$ with general term $ a_n = n^3 - (2n + 1)^2$, does there exist a term that is divisible by 2006?
Source: Seniors Problem 9
Tags: number theory unsolved, number theory
In the sequence $ (a_n)$ with general term $ a_n = n^3 - (2n + 1)^2$, does there exist a term that is divisible by 2006?