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A206674 Number of (n+1) X 7 0..2 arrays with no 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors or the same number of counterclockwise edge increases as its vertical neighbors. 1
160218, 1242930, 11368056, 97476666, 968502540, 9838056114, 108434010612, 1216758803376, 14276840963340, 169607787123510, 2060425946665152, 25191450280358046, 311526062730648630, 3864886491109553556 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A206676.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..78

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A251971 A013897 A205742 * A205518 A141816 A097626

Adjacent sequences:  A206671 A206672 A206673 * A206675 A206676 A206677

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 11 2012

STATUS

approved

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Last modified August 7 21:08 EDT 2022. Contains 355994 sequences. (Running on oeis4.)