A208352 Number of nX7 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)

715, 629860, 23658861, 2280287753, 340596199800, 52428246114853

Offset

1,1

Comments

Column 7 of A208353

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A266107 A030537 A140919 * A223061 A208863 A208871

Adjacent sequences: A208349 A208350 A208351 * A208353 A208354 A208355

Keyword

nonn

Author

R. H. Hardin Feb 25 2012

Status

approved