A286210 Number of n X 2 0..1 arrays with the number of 1's king-move adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 4, 17, 62, 238, 912, 3468, 13224, 50655, 194672, 750165, 2897898, 11219322, 43520672, 169113746, 658172740, 2565143148, 10010037116, 39107620002, 152948221004, 598750691827, 2346021879720, 9199672561659, 36102743330922

Offset

1,2

Comments

Column 2 of A286216.

Links

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

Example

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

Crossrefs

Cf. A286216.

Sequence in context: A006762 A297917 A202752 * A339286 A252815 A362593

Adjacent sequences: A286207 A286208 A286209 * A286211 A286212 A286213

Keyword

nonn

Author

R. H. Hardin, May 04 2017

Status

approved