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A156464 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 16. 0
1, 2, 2, 7, 19, 1430, 9131, 1559914, 17481322, 4701559354, 99812199364, 42194032310078 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..12.

CROSSREFS

Sequence in context: A243022 A049955 A184714 * A156520 A307426 A343577

Adjacent sequences: A156461 A156462 A156463 * A156465 A156466 A156467

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified March 28 21:13 EDT 2023. Contains 361596 sequences. (Running on oeis4.)