Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A058122
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A058122 Number of self-converse idempotent semigroups of order n. +0
3
1, 1, 1, 2, 6, 19, 68, 285 (list; graph; listen)
OFFSET

0,4
LINKS

Index entries for sequences related to semigroups

CROSSREFS

Main diagonal of A058118.

Sequence in context: A005654 A121655 A007721 this_sequence A038392 A044045 A008989

Adjacent sequences: A058119 A058120 A058121 this_sequence A058123 A058124 A058125

KEYWORD

nonn,hard

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Nov 10 2000

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

AT&T Labs Research

Legal Notice
© 2007 AT&T Knowledge Ventures. All Rights Reserved.