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A156399 Number of 9 X 9 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n. 0
1, 76, 1728, 9712, 34814, 40416, 130456, 149480, 644220, 297215, 1380432, 3924896, 4260776, 4171320, 5913728, 6328576, 17481322, 7436362, 23029656, 61580624, 75335814, 56271108, 62202832, 54904272, 183254724, 62428100, 176105168 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..26.

CROSSREFS

Sequence in context: A185819 A270960 A060190 * A232830 A278092 A153177

Adjacent sequences:  A156396 A156397 A156398 * A156400 A156401 A156402

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 09 2009

STATUS

approved

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Last modified January 26 23:09 EST 2022. Contains 350601 sequences. (Running on oeis4.)