A286973 Number of n X 2 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 0, 5, 30, 126, 520, 2088, 8192, 32083, 125728, 492331, 1927334, 7545086, 29542032, 115713230, 453479812, 1778221568, 6976989468, 27390464896, 107590106636, 422842742731, 1662688326476, 6541232413273, 25746371202362, 101384373381977, 399406874608396, 1574130883669277

Offset: 1

Author

R. H. Hardin, May 17 2017

Keywords

• nonn
• changed

Examples

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

Links

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

Crossrefs

Column 2 of A286979.