A317432 Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

2, 45, 201, 1140, 6964, 39216, 225065, 1322225, 7638732, 44316649, 257597032, 1494192462, 8673209233, 50350995888, 292232453854, 1696280208699, 9846142306726, 57150846167639, 331731209120051, 1925524077048630

Offset

1,1

Comments

Column 4 of A317436.

Links

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

R. H. Hardin, Empirical recurrence of order 68

Formula

Empirical recurrence of order 68 (see link above)

Example

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

Crossrefs

Cf. A317436.

Sequence in context: A200158 A316444 A316126 * A302468 A303250 A151583

Adjacent sequences: A317429 A317430 A317431 * A317433 A317434 A317435

Keyword

nonn

Author

R. H. Hardin, Jul 27 2018

Status

approved