login
A221600
Number of nX2 arrays of occupancy after each element moves to some king-move neighbor, without move-in move-out left turns
1
1, 19, 140, 1206, 10020, 84160, 705156, 5912277, 49563492, 415515336, 3483440165, 29203220338, 244823382148, 2052461910954, 17206688780344, 144251223226490, 1209321306131007, 10138271200549217, 84993576475914931, 712538449541938001
OFFSET
1,2
COMMENTS
Column 2 of A221602
LINKS
EXAMPLE
Some solutions for n=3
..0..0....0..0....1..1....1..2....2..1....0..1....0..2....1..0....0..2....1..1
..1..2....1..3....3..1....1..2....0..1....0..2....2..0....4..0....1..2....0..3
..1..2....0..2....0..0....0..0....1..1....1..2....1..1....1..0....1..0....0..1
CROSSREFS
Sequence in context: A104046 A060104 A201151 * A110694 A107962 A002615
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 20 2013
STATUS
approved