A284194 Number of n X 3 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

3, 13, 43, 412, 1919, 18842, 105367, 983238, 6123441, 54284366, 362590384, 3094974718, 21686456978, 180282797672, 1306154902037, 10663354100162, 79101065751066, 637908191485185, 4812317630514559, 38492627004755585

Offset

1,1

Comments

Column 3 of A284199.

Links

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

Example

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

Crossrefs

Cf. A284199.

Sequence in context: A062609 A004660 A208060 * A209296 A193041 A058407

Adjacent sequences: A284191 A284192 A284193 * A284195 A284196 A284197

Keyword

nonn

Author

R. H. Hardin, Mar 22 2017

Status

approved