A302307 Number of nX6 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

13, 113, 121, 663, 1595, 5715, 18990, 73663, 312122, 1468425, 7435015, 39732589, 220413622, 1252325938, 7234253383, 42220737525, 248052641109, 1463694696334, 8660691810640, 51336560128881, 304650450122309, 1809254624278226

Offset

1,1

Comments

Column 6 of A302309.

Links

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

Example

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

Crossrefs

Cf. A302309.

Sequence in context: A300319 A199642 A087609 * A293873 A044345 A166573

Adjacent sequences: A302304 A302305 A302306 * A302308 A302309 A302310

Keyword

nonn

Author

R. H. Hardin, Apr 05 2018

Status

approved