A317813 Number of nX6 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 10, 8, 56, 94, 142, 434, 1071, 2279, 6087, 15953, 40210, 104488, 270430, 701710, 1825318, 4749330, 12368352, 32279336, 84388645, 220794188, 577879166, 1513375097, 3965597997, 10397097617, 27277536409, 71596450975, 187986384248

Offset

1,2

Comments

Column 6 of A317815.

Links

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

Example

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

Crossrefs

Cf. A317815.

Sequence in context: A065691 A147974 A213553 * A038310 A318421 A280902

Adjacent sequences: A317810 A317811 A317812 * A317814 A317815 A317816

Keyword

nonn

Author

R. H. Hardin, Aug 07 2018

Status

approved