A058785 Number of n-rowed binary matrices with all row sums 6, up to row and column permutation; bipartite graphs with all nodes of degree 6 in a distinguished bipartite n-block, up to isomorphism.

1, 1, 7, 80, 3117, 441881, 195486906, 200065951078, 390629444879796, 1295710020278986959, 6764950163433890601997, 52637015698577710285832949, 585529138290221945767868247037, 9010635399744213671095287436920755

Offset

0,3

Links

Table of n, a(n) for n=0..13.

Number of m-rowed binary matrices with all row sums equal to n, up to row and column permutation

Crossrefs

Row n=6 of A331461.

Cf. A050535, A050913, A058783, A058784.

Sequence in context: A365817 A264691 A326223 * A373441 A171768 A050861

Adjacent sequences: A058782 A058783 A058784 * A058786 A058787 A058788

Keyword

nonn

Author

Vladeta Jovovic, Nov 28 2000

Extensions

a(6)-a(13) from Max Alekseyev, May 04 2018

Status

approved