A306132 Number of nX4 0..1 arrays with every element unequal to 0, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 24, 64, 498, 2922, 16877, 111073, 700859, 4405884, 28199822, 179362001, 1140613869, 7270251022, 46301421256, 294878401359, 1878528663477, 11965892345235, 76220990690570, 485534190519239, 3092850581186659

Offset

1,2

Comments

Column 4 of A306136.

Links

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

R. H. Hardin, Empirical recurrence of order 71

Formula

Empirical recurrence of order 71 (see link above)

Example

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

Crossrefs

Cf. A306136.

Sequence in context: A022761 A090386 A239596 * A118609 A127878 A205823

Adjacent sequences: A306129 A306130 A306131 * A306133 A306134 A306135

Keyword

nonn

Author

R. H. Hardin, Jun 22 2018

Status

approved