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A206191 Number of (n+1)X3 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two 1
1012, 18172, 329216, 5972392, 108363344, 1966171084, 35674679732, 647289744976, 11744575881312, 213096317372352, 3866469156691484, 70154115855170420, 1272892598372080320, 23095659424144383792, 419053017449035125152 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A206197

LINKS

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

FORMULA

Empirical: a(n) = 23*a(n-1) -97*a(n-2) +169*a(n-3) -151*a(n-4) +250*a(n-5) -178*a(n-6) +66*a(n-7) -64*a(n-8) +8*a(n-9) +4*a(n-10)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A080467 A023058 A223077 * A249987 A224920 A022054

Adjacent sequences: A206188 A206189 A206190 * A206192 A206193 A206194

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 04 2012

STATUS

approved

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Last modified December 3 20:26 EST 2022. Contains 358543 sequences. (Running on oeis4.)