A295204 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1s.

1, 13, 111, 777, 5831, 40924, 279663, 1900344, 12981261, 89115875, 612783404, 4213804514, 28966104726, 199059108169, 1367802766449, 9398558906151, 64581809194142, 443780394667276, 3049505888159977, 20955159932737734

Offset

1,2

Comments

Column 7 of A295205.

Links

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

Example

Some solutions for n=6
..0..1..1..0..0..0..0. .0..0..1..1..1..0..0. .0..0..1..1..1..1..1
..1..1..1..1..1..1..0. .1..1..1..0..1..1..0. .0..1..1..0..0..0..1
..1..1..1..0..0..1..1. .1..0..0..0..0..1..0. .0..1..0..0..1..1..1
..0..1..0..0..0..0..1. .1..1..1..0..0..1..0. .0..1..1..1..1..0..0
..0..1..1..1..1..0..1. .0..0..1..1..0..1..0. .0..0..0..0..0..0..0
..0..0..0..0..1..1..1. .0..0..0..1..1..1..0. .0..0..0..0..0..0..0

Crossrefs

Cf. A295205.

Sequence in context: A042941 A021344 A119744 * A298228 A298152 A299126

Adjacent sequences: A295201 A295202 A295203 * A295205 A295206 A295207

Keyword

nonn

Author

R. H. Hardin, Nov 16 2017

Status

approved