A181269 Number of n X (n+3) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order.

16, 188, 6236, 513260, 120854852, 79509209528

Offset

1,1

Comments

Superdiagonal 3 of A181266.

Links

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

Example

M and M*Mtranspose (mod 2) for 3 X 6
..0..0..0..1..0..1......0..0..1
..0..1..1..1..1..1......0..1..1
..1..0..1..0..1..1......1..1..0

Crossrefs

Cf. A181266.

Sequence in context: A016292 A231834 A181277 * A004333 A016237 A036735

Adjacent sequences: A181266 A181267 A181268 * A181270 A181271 A181272

Keyword

nonn

Author

R. H. Hardin, Oct 10 2010

Status

approved