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A156519 Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 64. 0
1, 2, 4, 11, 10047, 7176242, 28757181899, 477133046143746 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A038093 A057284 A156463 * A070314 A075554 A137369

Adjacent sequences:  A156516 A156517 A156518 * A156520 A156521 A156522

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Feb 09 2009

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Last modified February 17 12:38 EST 2012. Contains 206021 sequences.