A247598 Number of nonisomorphic binary n X n matrices with five 1's per column under row and column permutations.

1, 11, 471, 122038, 85820809, 96018336018, 146662126879117, 291352421255114277, 734102568216405642199, 2304488853198195872625924, 8882860158091727486388086786, 41519759838668575020971562079517, 232748666229847254694256869145439898, 1549417862125158239133077344950011140191

Offset

5,2

Links

Andrew Howroyd, Table of n, a(n) for n = 5..40

StackExchange, How many arrays with crossed cells, order of rows/columns irrelevant, Dec 13 2013

Maple

seq(matrix_marks(n, 5), n=3..15); # Using the uploaded program to A247417

Prog

(PARI) \\ See A304942 for Blocks
a(n) = Blocks(n, n, 5); \\ Andrew Howroyd, May 24 2018

Crossrefs

Column k=5 of A304942.

Cf. A247417, A247596, A247597.

Sequence in context: A233219 A288685 A068235 * A303207 A266026 A156863

Adjacent sequences: A247595 A247596 A247597 * A247599 A247600 A247601

Keyword

nonn

Author

Marko Riedel, Sep 21 2014

Extensions

Terms a(16) and beyond from Andrew Howroyd, May 24 2018

Status

approved