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A156499 Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 36. 0
1, 0, 0, 7, 15, 150, 1830, 136182, 3730237, 747469740, 63910429200 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
CROSSREFS
Sequence in context: A032018 A243470 A068366 * A137881 A042725 A041096
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 09 2009
STATUS
approved

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Last modified February 22 16:01 EST 2024. Contains 370256 sequences. (Running on oeis4.)