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!)
A216691 Number of horizontal, vertical, diagonal or knight-move neighbor colorings of an nX2 array with new integer colors introduced in row major order 0
1, 2, 9, 90, 1451, 33694, 1047754, 41569451, 2033056870, 119455094071, 8265294573126, 662782941109746, 60794941081100523, 6309797655336714672 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 2 of A216694
LINKS
EXAMPLE
Some solutions for n=4
..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1
..1..2....2..3....2..3....1..2....2..3....1..2....2..3....2..3....2..3....2..3
..3..4....4..5....3..4....0..3....0..1....3..4....3..4....4..5....3..4....3..4
..1..5....6..7....4..5....3..2....4..3....1..0....0..1....6..1....5..6....5..1
CROSSREFS
Sequence in context: A001192 A006120 A012941 * A059477 A136553 A266293
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 14 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 April 25 07:53 EDT 2024. Contains 371964 sequences. (Running on oeis4.)