A297228 Number of 6Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 neighboring 1s.

1, 88, 564, 2720, 30946, 261939, 1918732, 16176806, 134671502, 1084005062, 8855022968, 72556284402, 592076260322, 4833986775520, 39491897603294, 322560160507073, 2634426639664265, 21517102473205131, 175744528043164291

Offset

1,2

Comments

Row 6 of A297224.

Links

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

Example

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

Crossrefs

Cf. A297224.

Sequence in context: A236009 A236003 A183839 * A137124 A194651 A072432

Adjacent sequences: A297225 A297226 A297227 * A297229 A297230 A297231

Keyword

nonn

Author

R. H. Hardin, Dec 27 2017

Status

approved