A275564 Number of nX7 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

48, 2592, 3552, 23712, 138600, 867456, 5360184, 33275880, 206892990, 1286374716, 7998368250, 49754459556, 309431155980, 1924683955344, 11971565665080, 74462297454048, 463161757751784, 2880875453047152, 17919172630925406

Offset: 1

Author

R. H. Hardin, Aug 01 2016

Keywords

• nonn

Comments

Column 7 of A275565.

Examples

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

Links

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

Crossrefs

Cf. A275565.