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A206275 Number of (n+1) X 7 0..2 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors. 1
77580, 123357, 437340, 1824315, 8405508, 39044748, 167821686, 751671621, 3186738756, 14344492080, 63040672158, 293272589487, 1300384478688, 6029134019499, 26776062237576, 124337331861300, 551531622746376 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A206277.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A124489 A215662 A183694 * A249958 A232349 A157732

Adjacent sequences:  A206272 A206273 A206274 * A206276 A206277 A206278

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 05 2012

STATUS

approved

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Last modified January 21 21:44 EST 2022. Contains 350480 sequences. (Running on oeis4.)