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!)
A250020 Number of length 6+5 0..n arrays with no six consecutive terms having the maximum of any three terms equal to the minimum of the remaining three terms 1
20, 5102, 246560, 4732480, 50383892, 358850926, 1914587120, 8226417240, 29886098100, 94991593334, 270790229072, 705292752008, 1702428675220, 3850911187910, 8235751257376, 16772740216208, 32720682872916 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 6 of A250014
LINKS
FORMULA
Empirical: a(n) = n^11 - (7/6)*n^10 + (3907/560)*n^9 - (1139/240)*n^8 + (41257/2520)*n^7 - (69/8)*n^6 + (6293/720)*n^5 + (863/80)*n^4 - (5944/315)*n^3 + (55/4)*n^2 - (443/105)*n
EXAMPLE
Some solutions for n=2
..0....0....2....2....1....0....2....1....0....0....0....0....0....0....1....0
..2....0....0....0....2....0....2....0....0....2....2....2....0....2....0....2
..0....0....0....1....2....2....0....0....2....2....0....0....1....0....0....0
..2....2....2....2....0....1....1....0....2....0....0....0....2....2....2....0
..1....1....2....0....0....2....0....1....2....1....1....2....2....0....2....2
..0....2....0....0....0....2....2....1....0....0....1....1....2....2....0....1
..2....0....2....1....2....0....2....1....1....2....0....0....0....0....1....0
..2....2....0....0....2....0....0....0....0....0....2....2....0....2....2....2
..1....0....0....2....1....2....0....0....0....2....0....2....0....1....0....0
..2....2....2....2....0....0....1....0....1....2....0....0....1....2....0....0
..0....1....2....0....0....2....2....2....1....0....1....2....2....0....1....2
CROSSREFS
Sequence in context: A079759 A109894 A227765 * A088852 A123379 A175015
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 10 2014
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 15 21:59 EDT 2024. Contains 374334 sequences. (Running on oeis4.)