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!)
A183737 1/16 the number of (n+1) X 9 0..7 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease, and at least two adjacent blocks having the same increasing direction. 0
287769879, 659741463420, 1270931982853879, 3094892136980310870, 8974005118250282637773 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 8 of A183738.
LINKS
EXAMPLE
Some solutions with the first block increasing clockwise for 3 X 9:
..0..1..0..1..0..6..1..6..7....0..1..0..1..0..7..0..6..7
..3..2..3..2..4..5..3..4..2....3..2..3..2..4..5..2..3..1
..0..1..0..1..0..6..1..5..0....0..1..0..1..0..6..7..4..7
...
...R..L..R..L..L..R..L..R.......R..L..R..L..L..R..L..R...
...L..R..L..R..R..L..R..L.......L..R..L..R..R..L..R..L...
CROSSREFS
Sequence in context: A344519 A345720 A346361 * A234807 A204055 A344364
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 06 2011
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 June 20 23:18 EDT 2024. Contains 373535 sequences. (Running on oeis4.)