A316375 Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 908, 2822, 72713, 1076888, 16730969, 294007902, 4935143895, 82582592407, 1410527865988, 23843606066189, 403976896881288, 6855433666243828, 116194676409895349, 1970246428186618473, 33412110504800256937

Offset

1,2

Comments

Column 7 of A316376.

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

Crossrefs

Cf. A316376.

Sequence in context: A304893 A316575 A304550 * A306135 A317270 A002617

Adjacent sequences: A316372 A316373 A316374 * A316376 A316377 A316378

Keyword

nonn

Author

R. H. Hardin, Jun 30 2018

Status

approved