A318022 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

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