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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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 04 2012
STATUS
approved

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Last modified March 19 07:40 EDT 2024. Contains 370958 sequences. (Running on oeis4.)