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A156420
Number of 15 X 15 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.
0
1, 0, 0, 30693320, 1890254100, 0, 0, 686163316440, 4354347220860, 0, 0, 141370447642494, 817218706478195, 0, 0
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OFFSET
0,4
LINKS
Table of n, a(n) for n=0..14.
CROSSREFS
Sequence in context: A204346 A263644 A283619 * A252120 A297447 A205272
Adjacent sequences: A156417 A156418 A156419 * A156421 A156422 A156423
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2009
STATUS
approved

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Last modified October 5 04:48 EDT 2024. Contains 376530 sequences.
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