A296385 Number of nX7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 2 neighboring 1s.

37, 2728, 81661, 3372222, 138882856, 5498685275, 221204933878, 8887761158698, 356576134627608, 14315319558357738, 574677595957999964, 23068808260692029253, 926051656630306277098, 37174473698314395980970

Offset

1,1

Comments

Column 7 of A296386.

Links

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

Example

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

Crossrefs

Cf. A296386.

Sequence in context: A295846 A297719 A296738 * A296642 A295039 A295530

Adjacent sequences: A296382 A296383 A296384 * A296386 A296387 A296388

Keyword

nonn

Author

R. H. Hardin, Dec 11 2017

Status

approved