A302211 Number of n X 7 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 123, 72, 424, 1868, 11170, 55922, 291320, 1544411, 8168814, 43135601, 228337677, 1208744793, 6398223796, 33881994478, 179433657982, 950232876834, 5032989751367, 26658489563077, 141204904014504, 747985019374304

Offset

1,2

Comments

Column 7 of A302212.

Links

R. H. Hardin, Table of n, a(n) for n = 1..199

Example

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

Crossrefs

Cf. A302212.

Sequence in context: A351406 A123171 A125097 * A308004 A192231 A341992

Adjacent sequences: A302208 A302209 A302210 * A302212 A302213 A302214

Keyword

nonn

Author

R. H. Hardin, Apr 03 2018

Status

approved