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A156444 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 7. 0

%I #4 Dec 18 2015 18:17:16

%S 6,0,616,635,78688,149480,17605696,69492920,8671131376,72256187200,

%T 10754086795840,162770370597240,31157969676392800,681286019507189376

%N Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 7.

%K nonn

%O 4,1

%A _R. H. Hardin_ Feb 09 2009

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)