A284336 Number of 3 X n 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.

4, 13, 49, 373, 2259, 18114, 120058, 959041, 6725380, 53524100, 389145239, 3078502323, 22909373317, 180462930528, 1364622501692, 10722180215723, 81993405397067, 643447267719348, 4960055945696896, 38910411283028492

Offset

1,1

Comments

Row 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..1. .0..0..0..0. .0..0..0..1. .0..1..1..0. .0..0..1..1
..1..1..0..0. .0..0..0..0. .0..1..1..1. .0..1..0..1. .1..1..0..0
..0..0..1..0. .0..0..0..0. .1..0..0..1. .1..0..1..0. .1..1..0..0

Crossrefs

Cf. A284334.

Sequence in context: A149453 A149454 A101125 * A230081 A364907 A299699

Adjacent sequences: A284333 A284334 A284335 * A284337 A284338 A284339

Keyword

nonn

Author

R. H. Hardin, Mar 25 2017

Status

approved