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A156513 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 50. 0
3, 4, 174, 272, 48562, 360468, 211236822, 5909410784, 14595969900224 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..10.

CROSSREFS

Sequence in context: A041595 A041741 A041903 * A082213 A097172 A042081

Adjacent sequences:  A156510 A156511 A156512 * A156514 A156515 A156516

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified March 23 18:13 EDT 2019. Contains 321433 sequences. (Running on oeis4.)