A207418 Number of nX7 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 1 1 and 1 0 1 vertically

31, 961, 4719, 24317, 175903, 891720, 4094666, 21072638, 99746042, 440141222, 2003254604, 8937597494, 38381074339, 165425593855, 709144263593, 2981321572403, 12486729646315, 52162085656079, 215733902493821

Offset

1,1

Comments

Column 7 of A207419

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..1..1..1..0..0..0..0....1..1..1..1..1..0..0....0..1..1..1..0..0..0
..0..1..1..1..0..0..0....1..1..1..0..0..0..0....1..1..1..0..1..1..0
..0..0..0..0..0..0..0....0..1..1..0..0..0..0....0..0..0..0..0..0..0
..1..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0

Crossrefs

Sequence in context: A207734 A208693 A207563 * A223393 A207390 A207518

Adjacent sequences: A207415 A207416 A207417 * A207419 A207420 A207421

Keyword

nonn

Author

R. H. Hardin Feb 17 2012

Status

approved