A316574 Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 272, 291, 4262, 17695, 129257, 873130, 5763068, 41285414, 277573259, 1965195879, 13496039053, 94385750617, 654682766646, 4558519253070, 31702264810424, 220557985474475, 1534603577594039, 10676080941052407

Offset

1,2

Comments

Column 6 of A316576.

Links

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

Example

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

Crossrefs

Cf. A316576.

Sequence in context: A005933 A112820 A304892 * A062906 A253361 A133514

Adjacent sequences: A316571 A316572 A316573 * A316575 A316576 A316577

Keyword

nonn

Author

R. H. Hardin, Jul 07 2018

Status

approved