A156408 Number of 11 X 11 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.

1, 0, 0, 20340, 152820, 0, 0, 820040, 2771020, 0, 0, 17613711, 31103100, 0, 0, 108446720, 225908440, 0, 0, 634216200, 1150637340, 0, 0, 1586451660, 2932212900, 0, 0, 6089326340, 9256081380, 0, 0, 15249568960, 21668424870, 0, 0, 33802900495

Offset

0,4

Links

Table of n, a(n) for n=0..35.

Crossrefs

Sequence in context: A031825 A234631 A343243 * A045815 A182294 A103912

Adjacent sequences: A156405 A156406 A156407 * A156409 A156410 A156411

Keyword

nonn

Author

R. H. Hardin, Feb 09 2009

Status

approved