A317381 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

32, 45, 270, 1580, 10732, 75405, 508181, 3446847, 23624322, 161229670, 1098816831, 7502653827, 51215288080, 349470796318, 2385134752139, 16279122880898, 111101831408560, 758256658747120, 5175081010159005, 35319539304845840

Offset

1,1

Comments

Column 6 of A317383.

Links

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

Example

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

Crossrefs

Cf. A317383.

Sequence in context: A316418 A304924 A306164 * A178311 A319914 A167527

Adjacent sequences: A317378 A317379 A317380 * A317382 A317383 A317384

Keyword

nonn

Author

R. H. Hardin, Jul 26 2018

Status

approved