Number of (0,1) matrices with n ones and no zero rows or columns, up to row and column permutations.

A049311

Number of (0,1) matrices with n ones and no zero rows or columns, up to row and column permutations.

Terms

    a(0) =1a(1) =3a(2) =6a(3) =16a(4) =34a(5) =90a(6) =211a(7) =558a(8) =1430a(9) =3908a(10) =10725a(11) =30825a(12) =90156a(13) =273234a(14) =848355a(15) =2714399a(16) =8909057a(17) =30042866a(18) =103859678a(19) =368075596a(20) =1335537312a(21) =4958599228a(22) =18820993913a(23) =72980867400a(24) =288885080660

External references