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A209515 Number of (n+1) X 7 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to the number of counterclockwise edge increases. 1
598491, 181445643, 56515446141, 17769569448759, 5607670578249789, 1772313933013227273, 560493388203596285283, 177302245070678360735145, 56092636774113844825575603, 17746700710940389030443863763 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A209517.
LINKS
EXAMPLE
Some solutions for n=4:
..2..2..1..1..1..1..0....0..2..0..1..2..2..1....2..0..1..2..1..0..1
..0..0..2..1..1..1..0....1..0..2..0..1..2..1....1..2..0..1..0..1..1
..2..2..2..1..1..1..0....2..1..0..2..0..1..0....1..1..2..0..1..1..1
..1..1..1..2..1..1..1....2..1..1..0..2..0..0....0..0..1..2..0..0..0
..2..1..1..2..1..2..1....1..0..0..0..0..2..2....1..0..0..1..2..2..0
CROSSREFS
Sequence in context: A206598 A022257 A237536 * A106779 A106780 A304000
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 09 2012
STATUS
approved

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Last modified June 18 14:18 EDT 2024. Contains 373481 sequences. (Running on oeis4.)