A317821 Number of nX6 0..1 arrays with every element unequal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

5, 511, 1113, 11768, 47374, 296968, 1458418, 8231398, 43470698, 234869539, 1268932863, 6796211640, 36769146540, 197424396019, 1064758694845, 5732008854125, 30865744562047, 166276190963313, 895264358908034

Offset

1,1

Comments

Column 6 of A317823.

Links

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

Example

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

Crossrefs

Cf. A317823.

Sequence in context: A228093 A068234 A012741 * A318428 A318096 A249805

Adjacent sequences: A317818 A317819 A317820 * A317822 A317823 A317824

Keyword

nonn

Author

R. H. Hardin, Aug 07 2018

Status

approved