A305171 Number of nX4 0..1 arrays with every element unequal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

0, 18, 46, 410, 2397, 13970, 93426, 586718, 3677924, 23496484, 148684241, 941163254, 5971654744, 37839850436, 239798822661, 1520098487556, 9634266216810, 61062460761584, 387030710270010, 2453048690073328

Offset

1,2

Comments

Column 4 of A305175.

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

Crossrefs

Cf. A305175.

Sequence in context: A250731 A353209 A203596 * A034132 A218630 A099119

Adjacent sequences: A305168 A305169 A305170 * A305172 A305173 A305174

Keyword

nonn

Author

R. H. Hardin, May 26 2018

Status

approved