Determine the probability that for a positive base ten integer N drawn at random between 2 and 201 inclusively, the number N³ - 1 is expressible in the form p*q*r, where p, q and r are three distinct positive integers such that p, q and r (in this order) corresponds to three consecutive terms of an arithmetic progression.

(In reply to analytical solution? by broll)

 I second that motion

Posted by Ady TZIDON on 2010-06-01 09:23:47