A295415 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 3 1s.

37, 5854, 457178, 37927609, 3232240913, 272714953724, 23025368248778, 1945003010538968, 164274708080518128, 13874595126484055272, 1171853104636801040141, 98975023815069258155234

Offset

1,1

Comments

Column 7 of A295416.

Links

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

Example

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

Crossrefs

Cf. A295416.

Sequence in context: A153168 A195215 A183481 * A202801 A226307 A296598

Adjacent sequences: A295412 A295413 A295414 * A295416 A295417 A295418

Keyword

nonn

Author

R. H. Hardin, Nov 22 2017

Status

approved