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A156521 Number of nXn arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 64. +0
1
1, 0, 0, 3, 7, 132, 3039, 751770, 20902434, 14753635250 (list; graph; listen)
OFFSET

1,4

CROSSREFS

Sequence in context: A128071 A079622 A005844 this_sequence A012636 A006031 A119958

Adjacent sequences: A156518 A156519 A156520 this_sequence A156522 A156523 A156524

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Feb 09 2009

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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