A181267 Number of nX(n+1) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order

4, 11, 87, 1793, 108161, 17946611, 9014442178

Offset

1,1

Comments

Superdiagonal 1 of A181266

Links

Table of n, a(n) for n=1..7.

Example

M and M*Mtranspose (mod 2) for 3X4
..0..0..1..1......0..1..1
..1..0..1..0......1..0..0
..1..1..1..0......1..0..1

Crossrefs

Sequence in context: A004796 A320289 A298858 * A280036 A125888 A266894

Adjacent sequences: A181264 A181265 A181266 * A181268 A181269 A181270

Keyword

nonn

Author

R. H. Hardin Oct 10 2010

Status

approved