login
A221674
Number of nX3 arrays of occupancy after each element moves to some horizontal or vertical neighbor, without move-in move-out left turns
1
2, 27, 400, 5741, 81910, 1165913, 16583044, 235810525, 3352967744, 47674475534, 677859111916, 9638113778155, 137039061732784, 1948482984616486, 27704405262039888, 393913655872817605, 5600840943900558440
OFFSET
1,1
COMMENTS
Column 3 of A221676
LINKS
EXAMPLE
Some solutions for n=3
..0..2..1....1..1..1....2..1..0....2..1..0....2..2..0....1..1..1....1..3..1
..0..1..1....2..1..1....0..0..1....1..1..3....0..0..1....2..1..2....1..1..0
..0..2..2....0..1..1....1..3..1....0..0..1....1..2..1....0..0..1....0..1..1
CROSSREFS
Sequence in context: A377581 A278790 A277832 * A363961 A240701 A240638
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 21 2013
STATUS
approved