A156491 - OEIS

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A156491

Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 32.

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

%S 1,4,18,818,310150,480685728,1904647839311,14116339350926312

%N Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 32.

%K nonn

%O 2,2

%A _R. H. Hardin_ Feb 09 2009