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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 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
CROSSREFS
Sequence in context: A204346 A263644 A283619 * A252120 A297447 A205272
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2009
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)