A316637 Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

2, 45, 122, 524, 2342, 9773, 44095, 195387, 864584, 3862519, 17173279, 76452466, 340685629, 1516751816, 6755834593, 30091122083, 134013352168, 596898766434, 2658516219943, 11840669606842, 52737482373121, 234886906246219

Offset

1,1

Comments

Column 4 of A316641.

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

Crossrefs

Cf. A316641.

Sequence in context: A279680 A305363 A304955 * A281661 A019579 A302220

Adjacent sequences: A316634 A316635 A316636 * A316638 A316639 A316640

Keyword

nonn

Author

R. H. Hardin, Jul 09 2018

Status

approved