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A206406 Number of (n+1) X (n+1) 0..2 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases. 0
81, 5199, 2073999, 4099250889, 38883964087761, 1772313933215113017, 388756746462491144596125, 410796134340987248242931767083, 2092643007412378548348442168950591087 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A206414.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A222166 A219728 A187454 * A238172 A260858 A237300

Adjacent sequences:  A206403 A206404 A206405 * A206407 A206408 A206409

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 07 2012

STATUS

approved

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Last modified October 22 05:36 EDT 2021. Contains 348160 sequences. (Running on oeis4.)