A180990 Number of (n+1)xn binary matrices with rows and then columns in strictly increasing order as binary numbers

0, 0, 1, 19, 721, 67264, 16731459, 11654912023, 23649647075402, 144714747782240313, 2752761136943759699903, 167080696204654407079545988, 33078287865123858428157169233610

Offset

1,4

Comments

Subdiagonal 1 of A180989

Links

Table of n, a(n) for n=1..13.

Example

All solutions for 4X3
..0..1..1
..1..0..0
..1..0..1
..1..1..0

Crossrefs

Sequence in context: A344131 A078986 A364299 * A041687 A041684 A157165

Adjacent sequences: A180987 A180988 A180989 * A180991 A180992 A180993

Keyword

nonn

Author

R. H. Hardin Sep 30 2010

Status

approved