A296538 Number of nX5 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 4 neighboring 1s.

1, 15, 96, 431, 2104, 10734, 53995, 270584, 1360373, 6842490, 34397698, 172916932, 869345996, 4370695957, 21973721785, 110473467193, 555410077197, 2792348324294, 14038652292860, 70579951706145, 354843911694537

Offset

1,2

Comments

Column 5 of A296541.

Links

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

Example

Some solutions for n=7
..0..0..0..0..0. .1..1..1..0..0. .0..0..0..1..0. .0..0..1..0..0
..1..1..1..0..1. .1..1..0..0..0. .0..1..1..1..0. .1..1..1..0..1
..1..1..0..1..1. .1..0..0..1..0. .0..1..0..0..0. .1..0..0..1..1
..1..0..0..0..0. .0..1..1..1..0. .0..0..1..1..1. .0..0..1..1..1
..0..1..0..0..0. .0..1..0..0..1. .0..1..0..0..1. .0..0..0..0..0
..1..1..0..0..0. .1..1..0..1..1. .0..1..0..0..1. .0..1..0..0..0
..0..0..0..0..0. .0..0..1..1..1. .0..1..1..1..0. .1..1..0..0..0

Crossrefs

Cf. A296541.

Sequence in context: A044266 A044647 A289705 * A298105 A283168 A232296

Adjacent sequences: A296535 A296536 A296537 * A296539 A296540 A296541

Keyword

nonn

Author

R. H. Hardin, Dec 15 2017

Status

approved