A181268 Number of nX(n+2) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order

8, 44, 730, 32124, 3610319, 1225897310

Offset

1,1

Comments

Superdiagonal 2 of A181266

Links

Table of n, a(n) for n=1..6.

Example

M and M*Mtranspose (mod 2) for 3X5
..0..0..1..1..0......0..0..1
..1..0..0..0..0......0..1..1
..1..1..0..1..1......1..1..0

Crossrefs

Sequence in context: A366338 A129553 A174643 * A374281 A361490 A075863

Adjacent sequences: A181265 A181266 A181267 * A181269 A181270 A181271

Keyword

nonn

Author

R. H. Hardin Oct 10 2010

Status

approved