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

1,1

Comments

Row 4 of A284222.

Links

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

Example

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

Crossrefs

Cf. A284222.

Sequence in context: A167251 A227439 A144143 * A229011 A126628 A085353

Adjacent sequences: A284222 A284223 A284224 * A284226 A284227 A284228

Keyword

nonn

Author

R. H. Hardin, Mar 23 2017

Status

approved