A183448 Number of nX7 binary arrays with every 1 having exactly two king-move neighbors equal to 1

1, 121, 553, 2399, 34867, 257733, 1744887, 16192521, 132651622, 1038281076, 8774615462, 72803921204, 594525068675, 4940133605905, 40989589283304, 338552166728150, 2806660250827517, 23275769947149983, 192804453727767520

Offset

1,2

Comments

Column 7 of A183450

Links

R. H. Hardin, Table of n, a(n) for n = 1..232

Example

Some solutions for 5X7
..0..1..1..0..0..0..0....0..0..0..0..1..0..0....0..1..1..0..1..0..0
..1..0..0..1..0..0..0....0..0..0..1..1..0..0....0..0..1..0..1..1..0
..1..0..1..0..0..0..0....0..0..0..0..0..0..0....1..0..0..0..0..0..0
..0..1..0..0..1..0..0....0..0..0..0..0..1..1....1..1..0..0..1..1..0
..0..0..0..1..1..0..0....0..0..0..0..0..1..0....0..0..0..0..0..1..0

Crossrefs

Sequence in context: A236181 A077432 A017654 * A296127 A307798 A204034

Adjacent sequences: A183445 A183446 A183447 * A183449 A183450 A183451

Keyword

nonn

Author

R. H. Hardin Jan 04 2011

Status

approved