A305909 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

32, 284, 1124, 9140, 86944, 595490, 4408093, 36427606, 282035936, 2165124168, 17168241344, 135113020399, 1056973674222, 8327489019075, 65625783545765, 516335601781906, 4067981204530131, 32064360560681481, 252667585232353830

Offset

1,1

Comments

Column 6 of A305911.

Links

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

Example

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

Crossrefs

Cf. A305911.

Sequence in context: A316216 A305640 A317034 * A317151 A316881 A317609

Adjacent sequences: A305906 A305907 A305908 * A305910 A305911 A305912

Keyword

nonn

Author

R. H. Hardin, Jun 14 2018

Status

approved