A284224 Number of 3 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

4, 19, 70, 499, 3214, 22729, 163708, 1209005, 9018250, 67956917, 515031078, 3926103884, 30049105764, 230871573750, 1779036977175, 13746097605518, 106448904000193, 826010061981163, 6420762665883318, 49989175241774203

Offset: 1

Author

R. H. Hardin, Mar 23 2017

Keywords

• nonn

Comments

Row 3 of A284222.

Examples

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

Links

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

Crossrefs

Cf. A284222.