A331650 Number of binary matrices with n distinct columns and any number of distinct nonzero rows with 4 ones in every column and columns in decreasing lexicographic order.

1, 0, 0, 840, 768785, 1493786233, 5254074934990, 29830719723310370, 255792964622656480490, 3156204819384156606884415, 53951801951854013864607338684, 1238521839654509818636854497532129, 37207357446549003419594083481144144755, 1431264458992614322596852782769837314471920

Offset: 0

Author

Andrew Howroyd, Jan 24 2020

Keywords

• nonn

Comments

The condition that the columns be in decreasing order is equivalent to considering nonequivalent matrices with distinct columns up to permutation of columns.

Links

• Andrew Howroyd, Table of n, a(n) for n = 0..50

Crossrefs

Row n=4 of A331569.