A318213 Number of n X 7 0..1 arrays with every element unequal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 102, 329, 2321, 20502, 155972, 1122773, 8679924, 65844976, 507320695, 3880082075, 29828690068, 228795498352, 1756171508386, 13486852207318, 103512846881063, 794948107621166, 6103334633903798, 46863181424234369

Offset

1,1

Comments

Column 7 of A318214.

Links

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

Example

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

Crossrefs

Cf. A318214.

Sequence in context: A317862 A318551 A307461 * A001575 A366016 A328061

Adjacent sequences: A318210 A318211 A318212 * A318214 A318215 A318216

Keyword

nonn

Author

R. H. Hardin, Aug 21 2018

Status

approved