A303323 Number of nX6 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 32, 1, 10, 25, 56, 136, 531, 1035, 3668, 11020, 29763, 88919, 263974, 759319, 2234940, 6528470, 19011183, 55808342, 163149056, 476147024, 1393878718, 4076631347, 11916304345, 34854245923, 101919861889, 298028780792

Offset

1,2

Comments

Column 6 of A303325.

Links

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

Example

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

Crossrefs

Cf. A303325.

Sequence in context: A176341 A134203 A014777 * A301910 A302154 A221193

Adjacent sequences: A303320 A303321 A303322 * A303324 A303325 A303326

Keyword

nonn

Author

R. H. Hardin, Apr 21 2018

Status

approved