A284765 Number of n X 2 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.

0, 4, 14, 52, 206, 772, 2896, 10996, 41862, 159836, 612572, 2354880, 9076852, 35073264, 135823868, 527012084, 2048410070, 7974173484, 31085538148, 121332433984, 474123211448, 1854631573500, 7261693567782, 28457603057044

Offset: 1

Author

R. H. Hardin, Apr 02 2017

Keywords

• nonn

Comments

Column 2 of A284771.

Examples

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

Links

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

Crossrefs

Cf. A284771.