A297755 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 3 or 4 neighboring 1s.

1, 276, 16384, 162828, 2561262, 92963365, 2703029494, 57155337030, 1344335869151, 36051773147255, 927829330936828, 22707629564795527, 566201614678280167, 14406155879194342103, 363861774395456902677

Offset

1,2

Comments

Row 7 of A297749.

Links

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

Example

Some solutions for n=4
..0..0..0..0. .0..1..1..0. .0..0..1..0. .0..0..1..0. .0..1..0..0
..1..1..1..1. .0..0..0..0. .1..1..0..0. .0..0..1..1. .1..0..0..0
..1..0..0..1. .1..1..0..1. .0..0..1..0. .0..0..1..0. .0..0..0..0
..0..0..0..1. .1..0..1..0. .0..0..0..0. .1..0..1..0. .1..0..0..1
..0..0..1..1. .1..0..0..1. .0..0..0..0. .0..1..1..0. .0..1..1..0
..1..1..0..0. .1..1..0..0. .0..1..0..0. .0..0..0..0. .1..1..1..1
..1..0..0..0. .0..0..1..0. .0..0..1..0. .0..0..1..1. .0..1..1..0

Crossrefs

Cf. A297749.

Sequence in context: A333049 A297525 A169976 * A166192 A186466 A045022

Adjacent sequences: A297752 A297753 A297754 * A297756 A297757 A297758

Keyword

nonn

Author

R. H. Hardin, Jan 05 2018

Status

approved