A300463 Number of nX6 0..1 arrays with every element equal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 19, 68, 540, 7456, 78195, 935121, 10913850, 127028268, 1493618674, 17461316528, 204700167234, 2397343348003, 28083486453043, 328982201480033, 3853663395457966, 45143074414088192, 528811530208812741

Offset

1,2

Comments

Column 6 of A300465.

Links

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

Example

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

Crossrefs

Cf. A300465.

Sequence in context: A044157 A044538 A297226 * A204675 A007546 A007547

Adjacent sequences: A300460 A300461 A300462 * A300464 A300465 A300466

Keyword

nonn

Author

R. H. Hardin, Mar 06 2018

Status

approved