A286975 Number of n X 4 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, 30, 538, 8270, 123706, 1853532, 27938670, 424161696, 6473516290, 99212813068, 1525788269640, 23533226594814, 363874149524074, 5638501690692214, 87539755014915366, 1361389260565705844, 21203931694258697402

Offset: 1

Author

R. H. Hardin, May 17 2017

Keywords

• nonn

Comments

Column 4 of A286979.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..174

Crossrefs

Cf. A286979.