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

1,2

COMMENTS

Column 2 of A221602

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..72

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

Adjacent sequences: A221597 A221598 A221599 * A221601 A221602 A221603

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 20 2013

STATUS

approved

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Last modified December 1 03:09 EST 2022. Contains 358454 sequences. (Running on oeis4.)