T(n,k) = Number of lower triangles of an n X n integer array with all row and column sums zero and all row and column sums of squares <= 2k^2.

A195892

T(n,k) = Number of lower triangles of an n X n integer array with all row and column sums zero and all row and column sums of squares <= 2k^2.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =1a(7) =1a(8) =5a(9) =15a(10) =1a(11) =1a(12) =7a(13) =65a(14) =83a(15) =1a(16) =1a(17) =9a(18) =175a(19) =1349a(20) =591a(21) =1a(22) =1a(23) =11a(24) =369a(25) =14831a(26) =90013a(27) =5281a(28) =1a(29) =1

External references