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

1,1

COMMENTS

Column 1 of A205370

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

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

Adjacent sequences:  A205360 A205361 A205362 * A205364 A205365 A205366

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 26 2012

STATUS

approved

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Last modified October 26 21:33 EDT 2021. Contains 348269 sequences. (Running on oeis4.)