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A156439 Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 5. 0

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

%S 2,3,0,0,480,2400,0,0,7574400,66083040,0,0,896812758240,

%T 10058239033920,0,0,374736233227188672,5125335197750964000,0,0

%N Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 5.

%K nonn

%O 4,1

%A _R. H. Hardin_ Feb 09 2009

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Last modified March 4 02:53 EST 2024. Contains 370522 sequences. (Running on oeis4.)