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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A205816 Number of (n+1) X (n+1) 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock unequal to the number of counterclockwise edge increases. 0
24, 216, 2880, 67944, 2791080, 206195280, 27196042704, 6437088838008, 2723887997403024, 2064821553536444652, 2798458452635665138464 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A205823.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A104670 A205968 A232474 * A138406 A042112 A297679

Adjacent sequences:  A205813 A205814 A205815 * A205817 A205818 A205819

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 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 October 3 07:51 EDT 2022. Contains 357231 sequences. (Running on oeis4.)