A305449 Number of nX5 0..1 arrays with every element unequal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

3, 51, 44, 169, 1275, 2697, 13128, 58608, 222877, 971263, 4509456, 20052817, 89962877, 429934611, 2010364493, 9342799726, 45060857343, 214803238622, 1018900098942, 4925205324903, 23663249399671, 113385119300854

Offset

1,1

Comments

Column 5 of A305452.

Links

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

Example

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

Crossrefs

Cf. A305452.

Sequence in context: A071094 A144987 A304055 * A304701 A316452 A227069

Adjacent sequences: A305446 A305447 A305448 * A305450 A305451 A305452

Keyword

nonn

Author

R. H. Hardin, Jun 01 2018

Status

approved