A331716 Number of nonequivalent binary matrices with n distinct columns and any number of distinct nonzero rows with 3 ones in every column up to permutation of rows and columns.

1, 0, 0, 3, 19, 141, 1571, 21928

Offset

0,4

Links

Table of n, a(n) for n=0..7.

Crossrefs

Row n=3 of A331509.

Sequence in context: A221266 A082758 A110525 * A058859 A291964 A333094

Adjacent sequences: A331713 A331714 A331715 * A331717 A331718 A331719

Keyword

nonn,more

Author

Andrew Howroyd, Feb 01 2020

Status

approved