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A205363
Number of (n+1)X2 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock the same
3
256, 1976, 15616, 124048, 986388, 7854572, 62623348, 499915248, 3995675256, 31974871096, 256177589404, 2054827670052, 16500568550588, 132647236063288, 1067478673720944, 8599383059167200, 69343765363020324, 559711476205611868
OFFSET
1,1
COMMENTS
Column 1 of A205370
LINKS
FORMULA
Empirical: a(n) = 16*a(n-1) -63*a(n-2) -27*a(n-3) +182*a(n-4) -217*a(n-5) +114*a(n-6) -4*a(n-7) -4*a(n-8) +4*a(n-9) for n>10
EXAMPLE
Some solutions for n=4
..1..3....3..3....0..2....0..2....0..2....0..3....3..3....1..0....0..3....3..0
..2..3....0..0....0..3....2..1....0..1....0..0....0..1....2..3....2..2....1..2
..2..2....2..2....1..0....1..0....0..0....1..1....0..0....2..2....1..2....0..0
..1..2....3..2....2..1....2..1....0..1....1..3....1..1....1..1....1..1....2..1
..1..2....0..1....3..2....3..2....0..0....3..3....1..3....3..3....3..3....3..2
CROSSREFS
Sequence in context: A206188 A205370 A205659 * A237340 A237333 A221487
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 26 2012
STATUS
approved