A183460 Number of (n+4)X7 binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2X2 blocks of 1s

2, 11, 32, 69, 498, 1621, 4364, 30246, 103071, 318890, 1969710, 6832816, 23130558, 129897418, 458450153, 1654097198, 8623517185, 30994436542, 117035636551, 575738987147, 2107437728162, 8217863515859, 38636777002143, 143917572927793

Offset

1,1

Comments

Column 3 of A183465

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 9X7
..0..0..1..1..0..0..0....0..0..0..1..0..0..0....0..0..1..1..0..0..0
..0..1..1..0..1..0..0....0..0..1..1..1..0..0....0..1..0..1..1..0..0
..1..0..0..0..1..1..0....0..1..0..0..0..1..0....1..1..0..0..0..1..0
..1..1..0..0..1..0..0....1..1..0..0..0..1..1....0..1..0..0..0..1..1
..0..1..0..0..0..1..0....0..1..0..0..0..0..1....1..0..0..0..0..0..1
..0..0..1..0..0..1..1....1..0..0..0..0..1..0....1..1..0..0..0..0..1
..0..1..1..0..0..0..1....1..1..0..0..0..1..1....0..1..0..0..0..1..1
..0..0..1..0..1..1..0....0..1..0..1..0..1..0....0..0..1..1..0..1..0
..0..0..0..1..1..0..0....0..0..1..1..1..0..0....0..0..0..1..1..0..0

Crossrefs

Sequence in context: A190259 A190261 A000755 * A033994 A023659 A094792

Adjacent sequences: A183457 A183458 A183459 * A183461 A183462 A183463

Keyword

nonn

Author

R. H. Hardin Jan 05 2011

Status

approved