A302217 Number of 7Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 21, 1065, 172, 6423, 8756, 55922, 465040, 1136003, 19265064, 60547641, 699553699, 3796928584, 26139308319, 214325335931, 1151196050162, 10992872734396, 60033419186727, 538343914163895, 3376563558675197

Offset

1,1

Comments

Row 7 of A302212.

Links

R. H. Hardin, Table of n, a(n) for n = 1..111

Example

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

Crossrefs

Cf. A302212.

Sequence in context: A305039 A305585 A316692 * A302465 A303247 A302373

Adjacent sequences: A302214 A302215 A302216 * A302218 A302219 A302220

Keyword

nonn

Author

R. H. Hardin, Apr 03 2018

Status

approved