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

A156407

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

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =112a(5) =0a(6) =0a(7) =0a(8) =80a(9) =0a(10) =0a(11) =291a(12) =1380a(13) =0a(14) =0a(15) =0a(16) =468a(17) =0a(18) =0a(19) =868a(20) =1680a(21) =0a(22) =0a(23) =0a(24) =3500a(25) =0a(26) =0a(27) =4560a(28) =1180a(29) =0

External references