Number of 7 X 7 binary matrices with n ones, with no zero rows or columns, up to row and column permutation.

A056079

Number of 7 X 7 binary matrices with n ones, with no zero rows or columns, up to row and column permutation.

Terms

    a(0) =1a(1) =2a(2) =15a(3) =79a(4) =420a(5) =1744a(6) =6197a(7) =18715a(8) =50042a(9) =118121a(10) =250025a(11) =475791a(12) =820987a(13) =1287695a(14) =1845875a(15) =2423114a(16) =2923474a(17) =3246721a(18) =3327677a(19) =3150758a(20) =2761802a(21) =2242711a(22) =1690526a(23) =1183725a(24) =771951a(25) =469281a(26) =267108a(27) =142542a(28) =71844a(29) =34271

External references