A058784 - OEIS

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A058784

Number of n-rowed binary matrices with all row sums 5, up to row and column permutation; bipartite graphs with all nodes of degree 5 in a distinguished bipartite n-block, up to isomorphism.

9

1, 1, 6, 50, 1062, 56712, 7295812, 1817321457, 750572034647, 467477187494249, 413492386704135759, 498000976932085045800, 791133947048635010571251, 1616618616930983136958492360, 4162734189568898641317813946712, 13276910075946265356264268787123401

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..15.

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

CROSSREFS

Row n=5 of A331461.

Cf. A050535, A050913, A058783, A058785.

Sequence in context: A094072 A361193 A363315 * A008380 A196905 A066303

Adjacent sequences: A058781 A058782 A058783 * A058785 A058786 A058787

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Nov 28 2000

EXTENSIONS

a(7)-a(15) from Max Alekseyev, May 04 2018

STATUS

approved