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A156470
Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 19.
0
4, 68, 1844, 313880, 91441740, 58741831848, 78227960348272, 210460779796568160
OFFSET
3,1
CROSSREFS
Sequence in context: A362730 A000658 A351027 * A326288 A302115 A009473
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 09 2009
STATUS
approved