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!)
A213439 A000136(n)/2.
(Formerly N1106)
0
1, 3, 8, 25, 72, 231, 696, 2268, 7030, 23155, 73188, 242957, 778946, 2601345, 8430992, 28289598, 92470194, 311472985, 1025114180, 3463982109, 11465054942, 38846071490, 129180293184, 438697998100, 1464716085664, 4984101484479, 16698145444260, 56918978668875 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,2
REFERENCES
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
LINKS
CROSSREFS
Sequence in context: A093969 A259699 A259700 * A006177 A148788 A292778
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 11 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 18 22:09 EDT 2024. Contains 370951 sequences. (Running on oeis4.)