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!)
A206129 Number of (n+1) X (n+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly three counterclockwise and three clockwise edge increases. 0
256, 6668, 2761756, 5465582068, 51845281856116, 2363085244017636372, 518342328616619031217028, 547728179121316322465056282220 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A206137.

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A056585 A321818 A231307 * A236214 A232959 A187955

Adjacent sequences:  A206126 A206127 A206128 * A206130 A206131 A206132

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 04 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 July 6 14:10 EDT 2022. Contains 355110 sequences. (Running on oeis4.)