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A205640 Number of (n+1)X7 0..3 arrays with every 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward and upward neighbors. 1
17111320, 962953968, 163624211124, 46738310925116, 14510023537151756, 4561749663096542724, 1438784646024287898832, 454396326607940446880368, 143606330702285831573137588, 45403346502622885237604211100 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A205642.
LINKS
EXAMPLE
Some solutions for n=4:
..1..1..0..1..0..2..0....3..2..3..3..1..1..0....3..0..2..0..3..1..3
..3..2..2..1..3..2..3....2..0..1..0..0..3..3....1..3..0..3..1..0..1
..3..0..3..1..0..0..3....0..2..1..2..1..1..0....2..0..1..0..3..1..0
..2..2..2..2..2..1..3....3..2..3..2..3..2..3....3..1..2..1..0..2..1
..3..0..3..0..3..1..0....3..0..3..0..0..1..0....0..2..0..2..1..3..2
CROSSREFS
Sequence in context: A143510 A043680 A204673 * A175271 A172597 A172569
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 29 2012
STATUS
approved

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Last modified July 15 07:28 EDT 2024. Contains 374324 sequences. (Running on oeis4.)