A317861 Number of nX6 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

5, 46, 72, 313, 1001, 3315, 9045, 28091, 87900, 278545, 886735, 2839893, 9137066, 29485535, 95531190, 309974578, 1006908674, 3276702465, 10670545757, 34779631546, 113424839856, 370091478755, 1208010661000, 3944249049217

Offset

1,1

Comments

Column 6 of A317863.

Links

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

Example

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

Crossrefs

Cf. A317863.

Sequence in context: A318092 A050641 A112396 * A348786 A318550 A318212

Adjacent sequences: A317858 A317859 A317860 * A317862 A317863 A317864

Keyword

nonn

Author

R. H. Hardin, Aug 09 2018

Status

approved