A284329 Number of n X 3 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

3, 13, 49, 415, 2243, 19385, 122495, 1021999, 7013557, 56860451, 409700413, 3264497171, 24241023451, 191315053703, 1447951944431, 11372354830403, 87138438742684, 682980793270605, 5276292595391119, 41334416149705333

Offset

1,1

Comments

Column 3 of A284334.

Links

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

Example

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

Crossrefs

Cf. A284334.

Sequence in context: A045908 A118589 A113237 * A259338 A196907 A116427

Adjacent sequences: A284326 A284327 A284328 * A284330 A284331 A284332

Keyword

nonn

Author

R. H. Hardin, Mar 25 2017

Status

approved