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A206079 Number of (n+1)X3 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to one 1
960, 13672, 187144, 2567488, 35195768, 482548752, 6615795040, 90703800392, 1243565136120, 17049501235304, 233751713986960, 3204777864965096, 43938078463070080, 602398924621561376, 8258997140090964632 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A206085

LINKS

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

FORMULA

Empirical: a(n) = 15*a(n-1) -14*a(n-2) -61*a(n-3) +154*a(n-4) -152*a(n-5) +198*a(n-6) -166*a(n-7) +64*a(n-8) -28*a(n-9) +8*a(n-10)

EXAMPLE

Some solutions for n=4

..3..2..2....2..3..1....2..1..3....1..3..0....3..0..1....2..0..1....0..0..1

..1..1..2....3..3..3....2..2..2....1..3..0....3..0..1....2..0..0....3..0..0

..2..1..1....1..1..3....2..3..2....1..3..0....3..0..1....2..2..2....0..0..1

..1..1..2....2..1..1....2..3..1....3..3..3....3..0..0....0..2..3....2..0..0

..0..1..1....3..3..1....2..3..3....3..2..2....3..3..3....1..2..2....2..2..0

CROSSREFS

Sequence in context: A247723 A057666 A046788 * A203732 A157851 A278011

Adjacent sequences:  A206076 A206077 A206078 * A206080 A206081 A206082

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 03 2012

STATUS

approved

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Last modified October 20 17:28 EDT 2019. Contains 328268 sequences. (Running on oeis4.)