A316119 Number of nX4 0..1 arrays with every element unequal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 13, 23, 56, 213, 702, 2524, 9034, 33185, 120129, 440997, 1617873, 5923243, 21727149, 79684290, 292246407, 1071890143, 3931760361, 14421679034, 52899023769, 194038043140, 711745909568, 2610741818016, 9576434659125

Offset

1,2

Comments

Column 4 of A316123.

Links

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

R. H. Hardin, Empirical recurrence of order 70

Formula

Empirical recurrence of order 70 (see link above)

Example

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

Crossrefs

Cf. A316123.

Sequence in context: A194156 A139863 A304672 * A046862 A155093 A147443

Adjacent sequences: A316116 A316117 A316118 * A316120 A316121 A316122

Keyword

nonn

Author

R. H. Hardin, Jun 24 2018

Status

approved