A156401 - OEIS

A156401

Number of 9 X 9 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.

%I #5 Oct 27 2019 21:23:19

%S 1,12,0,0,2334,2400,0,0,10236,6871,0,0,19368,51672,0,0,78762,62322,0,

%T 0,352350,244572,0,0,568284,268092,0,0,590400,1134048,0,0,960648,

%U 688347,0,0,3730237,3085200,0,0,5025540,1936344,0,0,3311664,7083564,0,0,5061300

%N Number of 9 X 9 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.

%K nonn

%O 0,2

%A _R. H. Hardin_, Feb 09 2009