Irregular triangle read by rows: T(n,i) = number of n X n semi-canonical binary matrices with exactly i 1's, where 0 <= i <= n^2.

A268523

Irregular triangle read by rows: T(n,i) = number of n X n semi-canonical binary matrices with exactly i 1's, where 0 <= i <= n^2.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =1a(8) =1a(9) =3a(10) =8a(11) =10a(12) =9a(13) =8a(14) =3a(15) =1a(16) =1a(17) =1a(18) =1a(19) =3a(20) =8a(21) =25a(22) =49a(23) =84a(24) =107a(25) =121a(26) =101a(27) =72a(28) =41a(29) =24

External references