A295211 Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 3 1s.

1, 31, 345, 4938, 85215, 1245294, 18444470, 278238087, 4170628296, 62588525694, 940255638767, 14117945596996, 211965773459470, 3182555837979301, 47783850148231569, 717445698125438780, 10772054909227440585

Offset

1,2

Comments

Column 6 of A295213.

Links

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

Example

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

Crossrefs

Cf. A295213.

Sequence in context: A296730 A274180 A197644 * A261759 A156150 A125419

Adjacent sequences: A295208 A295209 A295210 * A295212 A295213 A295214

Keyword

nonn

Author

R. H. Hardin, Nov 17 2017

Status

approved