A285146 Number of n X 2 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.

0, 2, 12, 56, 236, 950, 3752, 14684, 57192, 222308, 863808, 3357766, 13061980, 50859826, 198235896, 773453896, 3020781528, 11809145656, 46207264696, 180955506800, 709219185000, 2781727573396, 10918267462160, 42882371536718

Offset: 1

Author

R. H. Hardin, Apr 12 2017

Keywords

• nonn

Comments

Column 2 of A285152.

Examples

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

Links

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

Crossrefs

Cf. A285152.