A221431 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Column 3 of A221432

LINKS

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

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 16 2013

STATUS

approved