A285155 Number of 4 X n 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, 56, 786, 11574, 159060, 2284666, 33371602, 495256266, 7426444716, 112236717358, 1706444466326, 26070175620594, 399870502837122, 6153779131538066, 94972379110894900, 1469319459956729810

Offset: 1

Author

R. H. Hardin, Apr 12 2017

Keywords

• nonn

Comments

Row 4 of A285152.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..176

Crossrefs

Cf. A285152.