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A156518 Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 61. +0
1
2, 12, 326, 16298, 5919644, 9055603332, 108964188487952, 6758216414353306068 (list; graph; listen)
OFFSET

2,1
CROSSREFS

Sequence in context: A122767 A094047 A091472 this_sequence A012727 A088229 A060596

Adjacent sequences: A156515 A156516 A156517 this_sequence A156519 A156520 A156521

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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