A317228 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

32, 293, 1468, 7988, 101712, 929233, 7953354, 80002584, 773208574, 7313110319, 70794354214, 683841167067, 6575649265592, 63418384000562, 611788490161263, 5897210639871099, 56864167445713295, 548379767667824359

Offset

1,1

Comments

Column 6 of A317230.

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..1..1..1..1..1. .0..1..0..0..0..1. .0..0..0..0..0..0
..0..1..0..0..0..0. .0..0..1..1..1..1. .0..1..1..0..0..0. .0..0..0..1..0..0
..1..0..0..0..1..0. .1..1..1..1..1..1. .0..0..0..0..1..0. .0..0..0..0..0..0
..0..1..0..1..0..0. .1..1..1..1..0..0. .0..1..0..0..0..0. .0..0..0..1..0..0
..1..0..0..0..0..0. .0..1..1..1..0..1. .1..1..0..0..0..1. .0..0..0..1..1..0

Crossrefs

Cf. A317230.

Sequence in context: A304470 A316287 A306051 * A250563 A060158 A074469

Adjacent sequences: A317225 A317226 A317227 * A317229 A317230 A317231

Keyword

nonn

Author

R. H. Hardin, Jul 24 2018

Status

approved