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!)
A215844 Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the even squares of an nX3 array with new integer colors introduced in row major order 1
1, 1, 4, 8, 102, 364, 8460, 40612, 1440676, 8520924, 419195864, 2916070032, 187464151920, 1489852279864, 120167989574768, 1069484429786480, 105066789765860688, 1031932540617115200, 120715131903960979168 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Column 3 of A215847
LINKS
EXAMPLE
Some solutions for n=4
..0..x..1....0..x..1....0..x..1....0..x..1....0..x..1....0..x..1....0..x..1
..x..2..x....x..2..x....x..2..x....x..2..x....x..2..x....x..2..x....x..2..x
..3..x..0....3..x..4....1..x..3....3..x..4....3..x..0....3..x..4....1..x..0
..x..1..x....x..1..x....x..4..x....x..5..x....x..4..x....x..0..x....x..3..x
CROSSREFS
Sequence in context: A071277 A336795 A273060 * A111100 A105036 A012940
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 24 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 March 2 15:08 EST 2024. Contains 370494 sequences. (Running on oeis4.)