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A221784
Number of n X 5 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops or left turns.
0
0, 8, 24, 173, 744, 4131, 19998, 104035, 520922, 2661269, 13452654, 68382023, 346582048, 1759291193, 8923150696, 45277608445
OFFSET
1,2
COMMENTS
Column 5 of A221787.
EXAMPLE
Some solutions for n=3
..0..1..1..1..1....0..2..2..1..1....0..2..2..2..1....0..2..2..1..1
..0..2..2..2..0....0..1..0..1..0....0..1..2..1..0....0..2..0..1..0
..0..1..2..2..0....1..2..2..2..0....0..1..1..2..0....1..1..2..2..0
CROSSREFS
Cf. A221787.
Sequence in context: A100042 A061027 A226962 * A052656 A094061 A182589
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 25 2013
STATUS
approved