A317149 Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

8, 28, 102, 416, 2313, 10682, 49746, 244887, 1177228, 5627176, 27191679, 131066702, 630509899, 3039081334, 14646383331, 70553902114, 339981134313, 1638328386371, 7894211192665, 38039938958253, 183306173610271, 883299222702849

Offset

1,1

Comments

Column 4 of A317153.

Links

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

R. H. Hardin, Empirical recurrence of order 69

Formula

Empirical recurrence of order 69 (see link above)

Example

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

Crossrefs

Cf. A317153.

Sequence in context: A305907 A110687 A153365 * A316879 A220710 A260935

Adjacent sequences: A317146 A317147 A317148 * A317150 A317151 A317152

Keyword

nonn

Author

R. H. Hardin, Jul 22 2018

Status

approved