A055084 Number of 6 X n binary matrices with no zero rows or columns, up to row and column permutation.

1, 15, 180, 2001, 20755, 200082, 1781941, 14637962, 111011667, 779695050, 5093379110, 31092553357, 178203364143, 963217652830, 4930357535218, 23989343505296, 111335037107474, 494383391324356, 2106346854756098

Offset

1,2

Links

Andrew Howroyd, Table of n, a(n) for n = 1..500

Prog

(PARI) Vec((G(6, x) - G(5, x))*(1 - x) + O(x^30)) \\ G defined in A028657. - Andrew Howroyd, Feb 28 2023

Crossrefs

Column k=6 of A056152.

Cf. A024206, A055609, A054976, A048291.

Sequence in context: A001717 A293476 A004992 * A005461 A373759 A138443

Adjacent sequences: A055081 A055082 A055083 * A055085 A055086 A055087

Keyword

nonn

Author

Vladeta Jovovic, Jun 13 2000

Status

approved