A300425 Number of nX6 0..1 arrays with every element equal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

5, 307, 7179, 150352, 3175101, 67378450, 1429216222, 30305915964, 642539662326, 13623564881896, 288856192539481, 6124529242982786, 129856489597183370, 2753306188517066333, 58377486735843370680, 1237759521220895928270

Offset

1,1

Comments

Column 6 of A300427.

Links

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

Example

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

Crossrefs

Cf. A300427.

Sequence in context: A042763 A323012 A342210 * A300687 A300610 A301352

Adjacent sequences: A300422 A300423 A300424 * A300426 A300427 A300428

Keyword

nonn

Author

R. H. Hardin, Mar 05 2018

Status

approved