login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A013549 Incorrect version of A000085. 0
1, 2, 4, 10, 41, 76 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Appears on page 2, Figure 2 (left column) of the reference; Corrollary 1.6 (page 17) says that the permutations counted are involutions. - Sean A. Irvine, Aug 08 2018

LINKS

Table of n, a(n) for n=1..6.

Frank Schmidt and Rodica Simion, Card shuffling and a transformation on S_n, Aequationes Math. 44 (1992), no. 1, 11-34.

CROSSREFS

Sequence in context: A322698 A153757 A159860 * A184253 A174136 A125805

Adjacent sequences:  A013546 A013547 A013548 * A013550 A013551 A013552

KEYWORD

nonn,dead

AUTHOR

N. J. A. Sloane.

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 April 1 05:04 EDT 2020. Contains 333155 sequences. (Running on oeis4.)