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A205742 Number of 7X(n+1) 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and no 2 X 2 subblock having the same number of counterclockwise edge increases as its vertical neighbors. 1
160218, 97380, 526680, 4116576, 33070572, 276139080, 2333010360, 20252939448, 177288165936, 1586346079800, 14299637864256, 131222784826716, 1212181534620348, 11354938195735176, 106955852324919060 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A205736.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A202936 A251971 A013897 * A206674 A205518 A141816

Adjacent sequences: A205739 A205740 A205741 * A205743 A205744 A205745

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 2012

STATUS

approved

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Last modified February 1 01:37 EST 2023. Contains 359981 sequences. (Running on oeis4.)