login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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: A344038 A250859 A251450 * A206185 A205367 A328288

Adjacent sequences: A205653 A205654 A205655 * A205657 A205658 A205659

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 3 14:49 EST 2022. Contains 358534 sequences. (Running on oeis4.)