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A156518 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 61. 0
2, 12, 326, 16298, 5919644, 9055603332, 108964188487952, 6758216414353306068 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..9.

CROSSREFS

Sequence in context: A094047 A300045 A091472 * A012727 A296622 A325756

Adjacent sequences:  A156515 A156516 A156517 * A156519 A156520 A156521

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified March 28 07:59 EDT 2020. Contains 333079 sequences. (Running on oeis4.)