A216662 Number of horizontal, vertical or knight-move neighbor colorings of an nX4 array with new integer colors introduced in row major order

5, 279, 59799, 45120796, 84915719366

Offset

1,1

Comments

Column 4 of A216663

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for n=2
..0..1..2..3....0..1..2..1....0..1..2..1....0..1..2..3....0..1..2..3
..3..2..4..0....3..4..5..3....3..2..3..0....4..0..5..0....1..4..5..6

Crossrefs

Sequence in context: A225781 A368754 A057209 * A203521 A276556 A283569

Adjacent sequences: A216659 A216660 A216661 * A216663 A216664 A216665

Keyword

nonn

Author

R. H. Hardin Sep 13 2012

Status

approved