Numbers n such that Q(n) + Q(n^2) + Q(n^3) is a perfect square where Q(n) is the sum of the digits of n.
9, 18, 45, 90, 171, 180, 207, 279, 297, 396, 414, 450, 459, 486, 567, 576, 693, 702
1 seqfan posts
Thu Jul 8 04:03:40 CEST 2010 [seqfan] A153185 == A088878