A305250 Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 4 or 8 king-move adjacent elements, with upper left element zero.

13, 61, 65, 163, 439, 1149, 2985, 8254, 22801, 62473, 173206, 483696, 1351172, 3787817, 10653872, 29999284, 84591982, 238789052, 674640909, 1907222785, 5394518268, 15264144917, 43204286796, 122316777218, 346357487746

Offset

1,1

Comments

Column 6 of A305252.

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

Crossrefs

Cf. A305252.

Sequence in context: A303806 A304853 A343538 * A304542 A228558 A316550

Adjacent sequences: A305247 A305248 A305249 * A305251 A305252 A305253

Keyword

nonn

Author

R. H. Hardin, May 28 2018

Status

approved