A305506 Number of nX5 0..1 arrays with every element unequal to 2, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

0, 61, 130, 1767, 13314, 101912, 855017, 6971744, 56056227, 460027479, 3744369997, 30459919249, 248461764341, 2023970288125, 16487763568205, 134364578393651, 1094738595047762, 8919632329662053, 72678409286259667, 592172715005066166

Offset

1,2

Comments

Column 5 of A305509.

Links

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

Example

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

Crossrefs

Cf. A305509.

Sequence in context: A283425 A142065 A304153 * A073761 A142093 A063337

Adjacent sequences: A305503 A305504 A305505 * A305507 A305508 A305509

Keyword

nonn

Author

R. H. Hardin, Jun 03 2018

Status

approved