A296641 Number of nX6 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.

21, 869, 17558, 430522, 10781621, 263456105, 6468185511, 158971670482, 3904685293187, 95910770509611, 2355968928839235, 57871858877263524, 1421555387086655166, 34918923658297830634, 857744546464670516645

Offset

1,1

Comments

Column 6 of A296643.

Links

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

Example

Some solutions for n=3
..0..1..0..1..1..1. .0..1..0..1..0..0. .0..0..0..1..1..0. .1..0..0..1..1..0
..0..1..1..0..0..1. .0..1..1..0..1..0. .0..1..0..0..0..1. .1..0..1..0..1..0
..1..1..1..0..0..0. .0..0..0..1..0..0. .1..1..0..0..1..0. .1..0..0..0..1..0

Crossrefs

Cf. A296643.

Sequence in context: A012819 A297718 A296384 * A295038 A295529 A296737

Adjacent sequences: A296638 A296639 A296640 * A296642 A296643 A296644

Keyword

nonn

Author

R. H. Hardin, Dec 17 2017

Status

approved