A183600 1/6 the number of (n+1)X7 0..2 arrays with every 2X2 subblock containing all three values.

10572, 574185, 27768032, 1376627608, 68026656422, 3366668183708, 166653005250320, 8251614370134644, 408619818725184342, 20236484168674868650, 1002238533164802053394, 49638595435230968839084

Offset: 1

Author

R. H. Hardin Jan 05 2011

Keywords

• nonn

Comments

Column 6 of A183603

Examples

			Some solutions with a(1,1)=0 for 3X7
..0..0..2..0..1..1..2....0..0..0..1..2..2..0....0..0..0..0..1..0..1
..1..2..1..0..2..0..1....1..2..1..2..0..1..0....1..2..1..2..2..0..2
..2..0..2..0..1..0..2....2..0..0..1..2..0..2....0..0..0..1..0..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200