A297229 Number of 7Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 neighboring 1s.

1, 189, 1620, 9861, 171851, 2063378, 20599895, 248421807, 2936448567, 33036817382, 380933664485, 4411216117906, 50689193709680, 583360678744857, 6721605421544199, 77399781711154720, 891207805003409728

Offset

1,2

Comments

Row 7 of A297224.

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..0..1..1. .0..0..0..0..0
..1..1..0..0..0. .1..0..0..1..1. .0..1..0..0..0. .0..0..0..0..0
..0..1..1..0..0. .0..0..0..0..0. .1..0..1..0..0. .0..1..0..1..0
..0..0..0..0..0. .0..0..0..0..0. .0..1..0..0..1. .1..0..1..0..0
..0..0..0..0..0. .0..0..0..1..1. .0..0..0..1..0. .0..0..0..0..0
..1..1..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..1..0..0
..0..0..0..1..1. .0..1..1..0..0. .0..0..0..1..1. .0..1..0..0..0

Crossrefs

Cf. A297224.

Sequence in context: A292173 A231394 A347383 * A211819 A266135 A133351

Adjacent sequences: A297226 A297227 A297228 * A297230 A297231 A297232

Keyword

nonn

Author

R. H. Hardin, Dec 27 2017

Status

approved