A284225 Number of 4 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.

8, 62, 467, 6511, 85887, 1214427, 17538010, 258414316, 3854276528, 58011648676, 879122723506, 13394856893254, 204995150323546, 3148797878923546, 48517163038369066, 749553577633265717, 11606806249286351346

Offset: 1

Author

R. H. Hardin, Mar 23 2017

Keywords

• nonn

Comments

Row 4 of A284222.

Examples

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

Links

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

Crossrefs

Cf. A284222.