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

Author

Marko Riedel, Sep 21 2014

Keywords

• nonn

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

Crossrefs

Column k=5 of A304942.

Cf. A247417, A247596, A247597.

Programs

Maple

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

PARI

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

Extensions

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