A208351 Number of nX6 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors)

187, 69988, 1901508, 103672036, 8045978096, 647640659639, 52428246114853

Offset

1,1

Comments

Column 6 of A208353

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A375333 A222911 A143661 * A241333 A223060 A208862

Adjacent sequences: A208348 A208349 A208350 * A208352 A208353 A208354

Keyword

nonn

Author

R. H. Hardin Feb 25 2012

Status

approved