A284766 Number of n X 3 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.

1, 14, 119, 720, 5637, 38792, 298003, 2180148, 16717575, 125826436, 966619242, 7382318636, 56924033734, 438478307376, 3394276530311, 26291371821860, 204232995801978, 1588199807894658, 12373790849896599, 96512252060362420

Offset

1,2

Comments

Column 3 of A284771.

Links

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

Example

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

Crossrefs

Cf. A284771.

Sequence in context: A006223 A091303 A241463 * A341390 A023012 A073383

Adjacent sequences: A284763 A284764 A284765 * A284767 A284768 A284769

Keyword

nonn

Author

R. H. Hardin, Apr 02 2017

Status

approved