A297518 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.

13, 529, 5079, 85843, 1671315, 25184119, 424461759, 7287075949, 119542912709, 2002902791701, 33647370739993, 560607123996981, 9377445295667227, 156927250471302049, 2622103739185322411, 43845148158283369263

Offset

1,1

Comments

Column 7 of A297519.

Links

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

Example

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

Crossrefs

Cf. A297519.

Sequence in context: A174564 A300525 A295942 * A281055 A030256 A023332

Adjacent sequences: A297515 A297516 A297517 * A297519 A297520 A297521

Keyword

nonn

Author

R. H. Hardin, Dec 31 2017

Status

approved