Date: Sep 26, 2013 1:08 PM
Author: Narasimham
Subject: next term in sequence

1,3,8,120,... is a series such that product of any two is one less for a perfect square.

The next number is quite big, what is it and more importantly, how is it found? (complexity increase as the numbers of cross-products increase).

Regards,
Narasimham