A317894 Number of nX6 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 16, 252, 3697, 67792, 1184196, 20734591, 364026326, 6382316173, 111913142446, 1962613676956, 34416957636316, 603541836561491, 10583875184727438, 185601684107768342, 3254759127437027807, 57076308019918523999

Offset

1,2

Comments

Column 6 of A317896.

Links

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

Example

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

Crossrefs

Cf. A317896.

Sequence in context: A110394 A220459 A160446 * A228982 A158531 A370964

Adjacent sequences: A317891 A317892 A317893 * A317895 A317896 A317897

Keyword

nonn

Author

R. H. Hardin, Aug 10 2018

Status

approved