login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A226270 Number of primitive permutations with n buds and 3 red or blue elements. 0
1, 7, 69, 843, 12081, 197127 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..5.

Adrian Ocneanu, On the inner structure of a permutation: bicolored partitions and Eulerians, trees and primitives; arXiv preprint arXiv:1304.1263, 2013

CROSSREFS

Cf. A167872, A226297, A226298, A226299.

Sequence in context: A025757 A243668 A265033 * A121351 A302353 A059321

Adjacent sequences:  A226267 A226268 A226269 * A226271 A226272 A226273

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jun 05 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 16 04:23 EDT 2019. Contains 325064 sequences. (Running on oeis4.)