A275182 Number of nX7 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,0) or (-1,1) and new values introduced in order 0..2.

365, 4096, 4021, 5653, 25241, 117916, 561044, 2688402, 12931103, 62408531, 302138208, 1466387881, 7128875693, 34691973269, 168923525976, 822823965071, 4008952988381, 19536216274450, 95219416747615, 464168982600409

Offset: 1

Author

R. H. Hardin, Jul 19 2016

Keywords

• nonn

Comments

Column 7 of A275183.

Examples

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

Links

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

Crossrefs

Cf. A275183.

Formula

Empirical recurrence of order 67 (see link above)