A181040 Number of nX(n+1) binary matrices with no initial bit string in any row or column divisible by 6

1, 3, 18, 410, 18708, 2894405, 990192011, 1043072889128, 2618513670862020, 19025225311119314543, 345763553584576198026139

Offset

1,2

Comments

Superdiagonal 1 of A181039

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for 5X6
..1..1..1..1..1..1....1..1..1..1..1..1....1..1..1..1..1..1....1..1..1..1..1..1
..1..0..0..0..0..0....1..0..1..1..0..0....1..0..0..0..0..0....1..0..0..0..0..0
..1..1..1..0..1..0....1..1..1..1..1..1....1..0..1..1..1..1....1..1..1..0..1..1
..1..0..0..0..0..0....1..0..0..0..0..0....1..0..0..1..1..0....1..1..1..0..1..0
..1..0..0..1..1..0....1..0..1..1..1..0....1..0..0..0..1..1....1..0..1..0..0..0

Crossrefs

Sequence in context: A083000 A370368 A303074 * A118704 A132514 A188801

Adjacent sequences: A181037 A181038 A181039 * A181041 A181042 A181043

Keyword

nonn

Author

R. H. Hardin Sep 30 2010

Status

approved