A316444 Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

2, 45, 182, 946, 5256, 26592, 139705, 743357, 3895564, 20551990, 108462086, 571420486, 3013738375, 15893704443, 83803905400, 441952817246, 2330642013397, 12290475240990, 64814511670451, 341801050087962, 1802496248933719

Offset

1,1

Comments

Column 4 of A316448.

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

Crossrefs

Cf. A316448.

Sequence in context: A302666 A304693 A200158 * A316126 A317432 A302468

Adjacent sequences: A316441 A316442 A316443 * A316445 A316446 A316447

Keyword

nonn

Author

R. H. Hardin, Jul 03 2018

Status

approved