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A205656 Number of (n+1)X6 0..3 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
986388, 7919128, 57716364, 639426584, 7578064080, 88431310744, 1092079388028, 13465529402424, 172083987692176, 2147939536254768, 27674881330828524, 347439396017429976, 4493096435992372036, 56517849184020808768 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A205659.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..115

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A213125 A250859 A251450 * A206185 A205367 A328288

Adjacent sequences:  A205653 A205654 A205655 * A205657 A205658 A205659

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 2012

STATUS

approved

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Last modified February 25 20:52 EST 2020. Contains 332258 sequences. (Running on oeis4.)