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A156406 Number of 11X11 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n. 0
1, 312, 26820, 424980, 4108632, 10491480, 36058540, 69492920, 448032730, 378230514, 1435365144, 3867308971, 10607876660, 16504055920, 18737188768, 31390349120, 99812199364, 71763897760, 163052061000, 338077231956 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..19.

CROSSREFS

Sequence in context: A296527 A107508 A015704 * A283492 A112729 A239818

Adjacent sequences:  A156403 A156404 A156405 * A156407 A156408 A156409

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified June 24 13:17 EDT 2019. Contains 324325 sequences. (Running on oeis4.)