MathDB
Classic algebra problem

Source: USAMO1994

August 22, 2005
LaTeXnumber theory unsolvednumber theory

Problem Statement

Let k1<k2<k3<\, k_1 < k_2 < k_3 < \cdots \, be positive integers, no two consecutive, and let sm=k1+k2++km\, s_m = k_1 + k_2 + \cdots + k_m \, for m=1,2,3,    \, m = 1,2,3, \ldots \; \;. Prove that, for each positive integer n,\, n, \, the interval [sn,sn+1)\, [s_n, s_{n+1}) \, contains at least one perfect square.