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A156408 Number of 11 X 11 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n. 0
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 27 04:10 EDT 2021. Contains 347673 sequences. (Running on oeis4.)