Number of 11 X 11 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.

A156408

Number of 11 X 11 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =20340a(4) =152820a(5) =0a(6) =0a(7) =820040a(8) =2771020a(9) =0a(10) =0a(11) =17613711a(12) =31103100a(13) =0a(14) =0a(15) =108446720a(16) =225908440a(17) =0a(18) =0a(19) =634216200a(20) =1150637340a(21) =0a(22) =0a(23) =1586451660a(24) =2932212900a(25) =0a(26) =0a(27) =6089326340a(28) =9256081380a(29) =0

External references