A316684 Number of nX6 0..1 arrays with every element unequal to 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 209, 2000, 62314, 1591947, 43037698, 1155724711, 31086640568, 836374058655, 22504657178375, 605524917825416, 16293346116194775, 438413660714386365, 11796679681729376902, 317420954784579390096, 8541051272153616512370

Offset

1,2

Comments

Column 6 of A316686.

Links

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

Example

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

Crossrefs

Cf. A316686.

Sequence in context: A304063 A305455 A305020 * A235731 A235512 A203040

Adjacent sequences: A316681 A316682 A316683 * A316685 A316686 A316687

Keyword

nonn

Author

R. H. Hardin, Jul 10 2018

Status

approved