A300504 Number of nX6 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

13, 6, 17, 68, 208, 1162, 4067, 20265, 88836, 420674, 1978897, 9427072, 44593246, 212266634, 1007469588, 4787708514, 22741208745, 108037995177, 513201504833, 2438021530346, 11581528859315, 55017874016905, 261360114793701

Offset

1,1

Comments

Column 6 of A300506.

Links

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

Example

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

Crossrefs

Cf. A300506.

Sequence in context: A033333 A322569 A004478 * A168210 A206612 A220131

Adjacent sequences: A300501 A300502 A300503 * A300505 A300506 A300507

Keyword

nonn

Author

R. H. Hardin, Mar 07 2018

Status

approved