login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A058143
Number of commutative monoids of order n with 2 idempotents.
1
1, 3, 9, 26, 98, 455, 4018, 101910, 10054303
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
2,2
LINKS
Table of n, a(n) for n=2..10.
Index entries for sequences related to monoids
CROSSREFS
Column 2 of
A058142
.
Sequence in context:
A148921
A148922
A148923
*
A126025
A317497
A114181
Adjacent sequences:
A058140
A058141
A058142
*
A058144
A058145
A058146
KEYWORD
nonn
,
more
AUTHOR
Christian G. Bower
, Nov 14 2000
EXTENSIONS
a(8)-a(10) from
Andrew Howroyd
, Feb 15 2022
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 August 14 16:54 EDT 2024. Contains 375166 sequences. (Running on oeis4.)