The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A081161 Number of even cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506, with two fixed-points of A057164. 2
0, 1, 4, 16, 60, 225, 848, 3188, 12095 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
Table of n, a(n) for n=0..8.
FORMULA
a(n) = A081160(2n+1).
CROSSREFS
Cf. A081160, A014137, A014138, A057505, A057506, A057164.
Sequence in context: A231896 A128650 A072335 * A032106 A269462 A047097
Adjacent sequences: A081158 A081159 A081160 * A081162 A081163 A081164
KEYWORD
nonn,more
AUTHOR
Wouter Meeussen and Antti Karttunen, Mar 10 2003
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 May 19 12:47 EDT 2024. Contains 372692 sequences. (Running on oeis4.)