A289647 Number of n X 4 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 44, 607, 8554, 121162, 1756800, 25760875, 382162921, 5717697619, 86172849366, 1306560879457, 19912006342895, 304785181627320, 4682731916448540, 72178508386597722, 1115665066715856620, 17287052005230219381

Offset: 1

Author

R. H. Hardin, Jul 09 2017

Keywords

• nonn

Comments

Column 4 of A289651.

Examples

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

Links

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

Crossrefs

Cf. A289651.