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!)
A058148 Monoids of order n with 2 idempotents, considered to be equivalent when they are isomorphic or anti-isomorphic (by reversal of the operator). 1
1, 3, 9, 30, 175, 3333 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,2
LINKS
CROSSREFS
Column 2 of A058147.
Sequence in context: A003604 A357615 A292300 * A031031 A306526 A034550
KEYWORD
nonn,more
AUTHOR
Christian G. Bower, Nov 14 2000
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 29 04:59 EDT 2024. Contains 371264 sequences. (Running on oeis4.)