A183449 Number of nX8 binary arrays with every 1 having exactly two king-move neighbors equal to 1

1, 253, 1505, 7761, 176949, 1817225, 16192521, 216103851, 2491241396, 26807184942, 319246780548, 3727927654904, 42498891259325, 496063346878031, 5787799084661820, 67059980281582582, 780988033705277709

Offset

1,2

Comments

Column 8 of A183450

Links

R. H. Hardin, Table of n, a(n) for n = 1..198

Example

Some solutions for 5X8
..0..1..0..0..1..1..0..0....0..1..0..0..0..0..0..0....0..0..0..0..0..0..0..0
..1..1..0..0..1..0..0..1....0..1..1..0..0..1..1..0....0..0..1..0..0..0..1..1
..0..0..0..0..0..0..1..1....0..0..0..0..1..0..0..1....0..1..1..0..0..0..1..0
..1..0..0..0..0..0..0..0....1..1..0..0..0..1..1..0....0..0..0..0..1..0..0..0
..1..1..0..0..0..0..0..0....1..0..0..0..0..0..0..0....0..0..0..0..1..1..0..0

Crossrefs

Sequence in context: A070193 A054737 A123013 * A225021 A242463 A271985

Adjacent sequences: A183446 A183447 A183448 * A183450 A183451 A183452

Keyword

nonn

Author

R. H. Hardin Jan 04 2011

Status

approved