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A156496 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 34. 0
2, 4, 92, 168, 23020, 138156, 34265768, 728427904, 659452297402 (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: A009277 A018410 A270484 * A007534 A299784 A009379

Adjacent sequences:  A156493 A156494 A156495 * A156497 A156498 A156499

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified August 26 03:38 EDT 2019. Contains 326324 sequences. (Running on oeis4.)