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A206203 Number of (n+1)X6 0..3 arrays with every 2X3 or 3X2 subblock having exactly one clockwise edge increases 1
29724, 22576, 27400, 70168, 118936, 236488, 713408, 1226384, 2475328, 7286528, 12463904, 24915264, 72915680, 124641664, 249152672, 729156800, 1246416640, 2491526720, 7291568000, 12464166400, 24915267200, 72915680000, 124641664000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A206206
LINKS
FORMULA
Empirical: a(n) = 10*a(n-3) for n>15
EXAMPLE
Some solutions for n=4
..1..1..2..2..1..0....3..0..0..1..1..1....0..0..2..1..1..0....3..0..0..1..1..1
..1..2..2..2..3..3....3..0..0..0..1..1....0..0..1..1..1..0....3..0..0..0..1..1
..2..2..2..3..3..3....3..3..0..0..0..1....0..1..1..1..3..3....3..3..0..0..0..1
..2..2..3..3..3..0....3..3..3..0..0..0....1..1..1..3..3..3....3..3..3..0..0..0
..2..3..3..3..0..0....2..3..3..3..0..0....1..1..3..3..3..1....0..3..3..3..0..0
CROSSREFS
Sequence in context: A204601 A203502 A228544 * A204283 A251054 A206070
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 04 2012
STATUS
approved

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Last modified April 21 03:36 EDT 2024. Contains 371850 sequences. (Running on oeis4.)