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A156519 Number of n X n 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; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..8.

CROSSREFS

Sequence in context: A156463 A227530 A218129 * A215795 A070314 A075554

Adjacent sequences:  A156516 A156517 A156518 * A156520 A156521 A156522

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified April 8 08:54 EDT 2020. Contains 333313 sequences. (Running on oeis4.)