A305456 Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

0, 702, 9889, 418382, 16062787, 612656116, 23996865179, 926180069711, 35989846262523, 1395378271164822, 54135760975112693, 2100037513280966131, 81464733115621938829, 3160246655805521489939, 122592970503091781121979

Offset

1,2

Comments

Column 7 of A305457.

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

Crossrefs

Cf. A305457.

Sequence in context: A203350 A321641 A304064 * A305021 A316685 A304766

Adjacent sequences: A305453 A305454 A305455 * A305457 A305458 A305459

Keyword

nonn

Author

R. H. Hardin, Jun 01 2018

Status

approved