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Search: id:A156470
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A156470 Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 19. +0
1
4, 68, 1844, 313880, 91441740, 58741831848, 78227960348272, 210460779796568160 (list; graph; listen)
OFFSET

3,1
CROSSREFS

Sequence in context: A141032 A156084 A000658 this_sequence A009473 A009520 A009791

Adjacent sequences: A156467 A156468 A156469 this_sequence A156471 A156472 A156473

KEYWORD

nonn

AUTHOR

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

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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