A181014 Number of nX(n+3) binary matrices with rows and columns each in strictly increasing order as binary numbers and every 0 adjacent to a 1 and every 1 adjacent to a 0.

0, 0, 0, 0, 0, 1, 144, 10251, 1452733, 403935677, 256514525924, 404979395412269

Offset

1,7

Comments

Superdiagonal 3 of A181011

Links

Table of n, a(n) for n=1..12.

Example

All solutions for 6X9
..0..1..1..1..1..1..1..1..1
..1..0..0..0..0..0..0..0..0
..1..0..0..1..1..1..1..1..1
..1..0..1..0..0..0..0..1..1
..1..0..1..0..0..1..1..0..0
..1..0..1..0..1..0..1..0..1

Crossrefs

Sequence in context: A299858 A308285 A008662 * A035821 A231854 A055352

Adjacent sequences: A181011 A181012 A181013 * A181015 A181016 A181017

Keyword

nonn

Author

R. H. Hardin, Sep 30 2010

Status

approved