A318022 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

32, 257, 1382, 9063, 60157, 400016, 2495323, 16110625, 103827789, 672266391, 4358202529, 28286904449, 183768652418, 1194433177052, 7767233878635, 50519999745212, 328673287698990, 2138526574564068, 13915945230318569

Offset

1,1

Comments

Column 6 of A318024.

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

Crossrefs

Cf. A318024.

Sequence in context: A097243 A357788 A022327 * A320407 A189651 A145711

Adjacent sequences: A318019 A318020 A318021 * A318023 A318024 A318025

Keyword

nonn

Author

R. H. Hardin, Aug 12 2018

Status

approved