A221431 Number of nX3 arrays of occupancy after each element moves to some king-move neighbor, without consecutive moves in the same direction

0, 286, 7573, 378956, 14043932, 581171214, 22893790059, 919540911485, 36619267868969, 1463288838011586

Offset

1,2

Comments

Column 3 of A221432

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A027798 A072817 A117994 * A306144 A130433 A140926

Adjacent sequences: A221428 A221429 A221430 * A221432 A221433 A221434

Keyword

nonn

Author

R. H. Hardin Jan 16 2013

Status

approved