A317220 Number of nX6 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

5, 1493, 40873, 1580822, 57448875, 2106680104, 77171164500, 2827889481366, 103616727948480, 3796796535097669, 139124318060053699, 5097884223715735117, 186800168025968954100, 6844861645491319379364, 250814219723168200221773

Offset

1,1

Comments

Column 6 of A317222.

Links

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

Example

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

Crossrefs

Cf. A317222.

Sequence in context: A304425 A316280 A305959 * A305690 A317070 A316951

Adjacent sequences: A317217 A317218 A317219 * A317221 A317222 A317223

Keyword

nonn

Author

R. H. Hardin, Jul 23 2018

Status

approved