Those who find that an engaging question may enjoy the following paper:
Every multiple of 4 except 212, 364, 420, and 428 is the sum of seven cubes by Kent D. Boklan and Noam D. Elkies http://arxiv.org/PS_cache/arxiv/pdf/0903/0903.4503v1.pdf ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
