A206690 Number of nX6 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order

8, 376, 2816, 24492, 213788, 1915580, 17277556, 156946368, 1429962032, 13057140562, 119353104128, 1091748256156, 9990044761998, 91434371494388, 836958605238016, 7661779056726008, 70141114109343664, 642134221496445414

Offset

1,1

Comments

Column 6 of A206692

Links

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

Example

Some solutions for n=4
..0..1..2..3..1..0....0..1..2..3..1..2....0..1..2..0..1..3....0..1..2..3..1..0
..2..3..1..0..2..1....1..0..3..1..0..3....1..0..3..1..2..0....2..3..1..2..3..1
..1..2..3..1..0..3....2..3..0..2..3..1....3..2..1..3..0..1....1..2..0..1..2..3
..0..1..2..3..1..0....3..1..2..3..1..2....0..1..2..0..1..2....3..0..2..3..1..2

Crossrefs

Sequence in context: A240380 A038016 A221775 * A349114 A266920 A072447

Adjacent sequences: A206687 A206688 A206689 * A206691 A206692 A206693

Keyword

nonn

Author

R. H. Hardin Feb 11 2012

Status

approved