A231215 Number of (n+1) X (4+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and vertical neighbors, with values 0..2 introduced in row major order.

12, 59, 408, 2892, 20027, 139438, 969461, 6745110, 46938804, 326645650, 2273218682, 15819608975, 110091246193, 766140117967, 5331683762978, 37103974744989, 258212125773531, 1796936761480570, 12505151919361622

Offset: 1

Author

R. H. Hardin, Nov 05 2013

Keywords

• nonn

Comments

Column 4 of A231219.

Examples

			Some solutions for n=4:
..0..1..1..2..2....0..1..1..2..2....0..0..1..1..2....0..0..0..0..0
..0..1..1..2..2....0..1..1..2..2....0..0..1..1..2....0..0..1..1..0
..0..1..1..1..2....0..2..2..2..2....0..0..1..1..2....1..1..1..1..0
..0..1..1..1..2....0..2..2..1..1....0..0..1..1..2....1..1..1..1..0
..0..1..1..1..2....0..2..2..1..1....2..2..2..2..2....1..1..1..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 68

Crossrefs

Cf. A231219.

Formula

Empirical recurrence of order 68 (see link above).