A303623 Number of nX7 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 496, 5411, 160807, 5249045, 179884814, 6323564388, 224091914399, 7966090548780, 283582960504149, 10101258867472961, 359903623078870120, 12824695714808614687, 457013934122432156738, 16286250681449999285061

Offset

1,2

Comments

Column 7 of A303624.

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

Crossrefs

Cf. A303624.

Sequence in context: A303083 A302888 A349699 * A249200 A249215 A249322

Adjacent sequences: A303620 A303621 A303622 * A303624 A303625 A303626

Keyword

nonn

Author

R. H. Hardin, Apr 27 2018

Status

approved