Triangle T(n, k) of the number of n X n binary matrices with k = 0..n^2 1's and no more than three 1's in the corners of any square sub-block.

A227436

Triangle T(n, k) of the number of n X n binary matrices with k = 0..n^2 1's and no more than three 1's in the corners of any square sub-block.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =4a(4) =6a(5) =4a(6) =0a(7) =1a(8) =9a(9) =36a(10) =84a(11) =121a(12) =101a(13) =38a(14) =4a(15) =0a(16) =0a(17) =1a(18) =16a(19) =120a(20) =560a(21) =1806a(22) =4200a(23) =7096a(24) =8532a(25) =6929a(26) =3444a(27) =876a(28) =84a(29) =2

External references