A275348 Number of nX4 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,-2) and new values introduced in order 0..2.

14, 486, 1536, 6156, 31536, 175152, 982152, 5645376, 33154200, 197081664, 1176717272, 7054784192, 42406446716, 255340091420, 1538613779712, 9277198809020, 55956031182028, 337589432181096, 2036924853334720

Offset: 1

Author

R. H. Hardin, Jul 24 2016

Keywords

• nonn

Comments

Column 4 of A275352.

Examples

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

Links

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

Crossrefs

Cf. A275352.