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A156454 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 11. 0
2, 22, 48, 1568, 9108, 459944, 3924896, 332810880, 3867308971, 659368209568, 11298978667872, 4499416656998240 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..14.

CROSSREFS

Sequence in context: A306969 A200946 A322157 * A168669 A271883 A152995

Adjacent sequences:  A156451 A156452 A156453 * A156455 A156456 A156457

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified January 26 07:14 EST 2022. Contains 350572 sequences. (Running on oeis4.)