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A207046
Number of (n+1)X5 0..2 arrays with every 2X3 or 3X2 subblock having exactly one clockwise edge increases
1
1416, 1182, 1272, 2244, 3408, 4836, 9144, 13950, 19752, 36912, 55944, 79032, 147648, 223776, 316128, 590592, 895104, 1264512, 2362368, 3580416, 5058048, 9449472, 14321664, 20232192, 37797888, 57286656, 80928768, 151191552, 229146624
OFFSET
1,1
COMMENTS
Column 4 of A207050
LINKS
FORMULA
Empirical: a(n) = 4*a(n-3) for n>12
EXAMPLE
Some solutions for n=4
..2..0..0..2..1....2..0..0..1..1....0..2..1..1..0....2..2..0..0..2
..0..0..0..1..1....2..0..0..0..1....0..0..1..1..1....2..0..0..0..2
..0..0..1..1..1....2..2..0..0..0....0..0..0..1..1....0..0..0..1..1
..0..1..1..1..2....2..2..2..0..0....1..0..0..0..1....0..0..1..1..1
..0..1..1..2..2....1..2..2..2..0....1..2..0..0..0....0..1..1..1..2
CROSSREFS
Sequence in context: A143192 A237863 A263671 * A237220 A188099 A252106
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2012
STATUS
approved