A297581 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1s.

13, 183, 2085, 20771, 284289, 3355439, 38609160, 476513137, 5731862594, 67900170433, 820250735104, 9868451991387, 117996838335341, 1418191530812586, 17043255221943522, 204368024253087875, 2453682222488823920

Offset

1,1

Comments

Column 7 of A297582.

Links

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

Example

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

Crossrefs

Cf. A297582.

Sequence in context: A178303 A158548 A285399 * A268413 A274345 A227503

Adjacent sequences: A297578 A297579 A297580 * A297582 A297583 A297584

Keyword

nonn

Author

R. H. Hardin, Jan 01 2018

Status

approved