A305914 Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

5, 21, 27, 101, 347, 1129, 4982, 23181, 101615, 481454, 2332962, 11031069, 52713092, 254276678, 1219410066, 5849035794, 28135957701, 135212478429, 649485620674, 3121936522853, 15005508174783, 72108968570806, 346566325528536

Offset

1,1

Comments

Column 4 of A305918.

Links

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

R. H. Hardin, Empirical recurrence of order 66

Formula

Empirical recurrence of order 66 (see link above)

Example

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

Crossrefs

Cf. A305918.

Sequence in context: A351325 A303965 A304351 * A303036 A305343 A186304

Adjacent sequences: A305911 A305912 A305913 * A305915 A305916 A305917

Keyword

nonn

Author

R. H. Hardin, Jun 14 2018

Status

approved