A181043 Number of n X (n+4) binary matrices with no initial bit string in any row or column divisible by 6.

1, 19, 269, 42883, 5771475, 5331905284, 6251857873453, 34559676018342904, 328751379952928324341, 11545551726979619784678193, 845551048282095882508846950229

Offset

1,2

Comments

Superdiagonal 4 of A181039.

Links

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

Example

Some solutions for 4 X 8
..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..0..1....1..0..1..0..0..1..0..1....1..0..1..0..0..0..0..1
..1..0..0..1..1..1..1..1....1..0..1..0..1..1..1..1....1..0..1..0..1..1..1..1
..1..0..1..1..1..1..1..0....1..1..1..0..1..1..0..0....1..0..1..0..0..0..1..1

Crossrefs

Cf. A181039.

Sequence in context: A253217 A245237 A141942 * A142899 A083004 A139739

Adjacent sequences: A181040 A181041 A181042 * A181044 A181045 A181046

Keyword

nonn

Author

R. H. Hardin, Sep 30 2010

Status

approved