A320361 Number of nX5 0..1 arrays with every element unequal to 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 5, 60, 657, 7902, 91711, 1076811, 12633183, 148082443, 1736213698, 20357548449, 238693491568, 2798676228713, 32814460150445, 384749618366454, 4511189841036949, 52893701506634832, 620178660144475112

Offset

1,2

Comments

Column 5 of A320364.

Links

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

Example

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

Crossrefs

Cf. A320364.

Sequence in context: A290747 A212700 A099672 * A138134 A283779 A353875

Adjacent sequences: A320358 A320359 A320360 * A320362 A320363 A320364

Keyword

nonn

Author

R. H. Hardin, Oct 11 2018

Status

approved