A295530 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 4 1s.

37, 2735, 113466, 5400933, 253594307, 11938414614, 563330031268, 26515589323171, 1248681784524804, 58814998591494213, 2770085782332161201, 130464623191695045459, 6144598685123051237293, 289398247960170761817752

Offset

1,1

Comments

Column 7 of A295531.

Links

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

Example

Some solutions for n=5
..0..0..0..0..0..1..1. .0..0..0..1..0..1..1. .0..0..0..1..0..1..1
..0..0..0..0..0..0..0. .0..0..0..1..0..0..0. .0..0..0..1..1..1..1
..0..0..0..0..0..0..1. .0..0..0..0..0..1..0. .0..0..0..0..0..1..0
..0..0..0..1..0..0..1. .0..0..0..0..0..1..1. .0..0..0..1..1..0..0
..0..0..1..1..0..1..1. .0..0..0..0..0..0..1. .0..0..1..1..0..0..0

Crossrefs

Cf. A295531.

Sequence in context: A296385 A296642 A295039 * A174750 A183524 A105839

Adjacent sequences: A295527 A295528 A295529 * A295531 A295532 A295533

Keyword

nonn

Author

R. H. Hardin, Nov 23 2017

Status

approved