A305514 Number of nX6 0..1 arrays with every element unequal to 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

5, 5, 19, 38, 108, 343, 925, 2627, 7334, 20665, 56990, 159501, 448046, 1238263, 3464117, 9688753, 26905744, 75167708, 209780236, 584191642, 1630491607, 4547388813, 12677376191, 35365875462, 98624293125, 275037739818

Offset

1,1

Comments

Column 6 of A305516.

Links

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

R. H. Hardin, Empirical recurrence of order 91

Formula

Empirical recurrence of order 91 (see link above)

Example

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

Crossrefs

Cf. A305516.

Sequence in context: A146146 A145937 A246983 * A039914 A274910 A370547

Adjacent sequences: A305511 A305512 A305513 * A305515 A305516 A305517

Keyword

nonn

Author

R. H. Hardin, Jun 03 2018

Status

approved