A181013 Number of nX(n+2) 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, 6, 168, 5729, 425290, 66925648, 24963075674, 23635084462403, 59754398931781339

Offset

1,6

Comments

Superdiagonal 2 of A181011

Links

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

Example

All solutions for 6X8
..0..1..1..1..1..1..1..1....0..1..1..1..1..1..1..1....0..1..1..1..1..1..1..1
..1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0
..1..0..0..1..1..1..1..1....1..0..0..1..1..1..1..1....1..0..0..1..1..1..1..1
..1..0..1..0..0..0..0..1....1..0..1..0..0..0..0..1....1..0..1..0..0..0..0..1
..1..0..1..0..0..1..1..0....1..0..1..0..0..1..1..1....1..0..1..0..0..1..1..0
..1..0..1..0..1..0..1..0....1..0..1..0..1..0..1..0....1..0..1..0..1..0..1..1
...
..0..1..1..1..1..1..1..1....0..1..1..1..1..1..1..1....0..1..1..1..1..1..1..1
..1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0
..1..0..0..1..1..1..1..1....1..0..0..1..1..1..1..1....1..0..0..1..1..1..1..1
..1..0..1..0..0..0..1..1....1..0..1..0..0..0..1..1....1..0..1..0..0..0..1..1
..1..0..1..0..0..1..0..0....1..0..1..0..0..1..0..0....1..0..1..0..1..1..0..0
..1..0..1..0..1..0..0..1....1..0..1..0..1..1..0..1....1..0..1..1..0..1..0..1

Crossrefs

Sequence in context: A106661 A356768 A322708 * A003720 A306837 A002884

Adjacent sequences: A181010 A181011 A181012 * A181014 A181015 A181016

Keyword

nonn

Author

R. H. Hardin Sep 30 2010

Status

approved