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A206744 Number of (n+1) X (n+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases. 0
256, 36384, 43894936, 343128343904, 16261882009570952, 4664832957577714246616 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A206752.

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4:

..0..0..0..0..1....2..2..3..0..3....0..0..3..0..0....1..0..0..0..0

..0..1..0..3..0....3..2..2..3..0....1..1..0..3..3....3..1..0..1..0

..2..3..1..0..0....1..3..2..3..3....3..3..1..0..3....1..3..1..3..1

..2..2..3..2..0....1..3..3..3..0....1..1..3..1..0....1..1..3..0..2

..0..0..1..3..2....3..2..2..2..3....0..1..1..2..1....0..0..1..2..0

CROSSREFS

Sequence in context: A206101 A221091 A205458 * A207791 A018798 A017320

Adjacent sequences:  A206741 A206742 A206743 * A206745 A206746 A206747

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 12 2012

STATUS

approved

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Last modified February 6 05:18 EST 2016. Contains 268029 sequences.