This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A003061 Number of non-Abelian (finite) groups with n conjugacy classes. (Formerly M1728) 5
 0, 0, 1, 2, 7, 7, 11, 18, 24, 37, 34, 30 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 REFERENCES E. K. Annavaddar, Determination of the Finite Groups Having Eight Conjugacy Classes. Ph.D. Diss., Arizona State Univ., 1971. N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS J. Poland, Finite groups with a given number of conjugate classes<, Canad. J. Math. 20 1968 456-464. J. Poland, Finite groups with a given number of conjugate classes, Canad. J. Math. 20 1968 456-464. (Annotated scanned copy) FORMULA A073043(n) = a(n) + A000688(n). EXAMPLE 1,1,2,4,8,8,12,21,26,38,35,32 (A073043) 1,1,1,2,1,1,.1,.3,.2,.1,.1,.2 (subtract A000688) ----------------------------- 0,0,1,2,7,7,11,18,24,37,34,30 (A003061) CROSSREFS Cf. A002319, A000688, A073043 (for total number), A006379. Sequence in context: A238734 A316352 A114532 * A087385 A168278 A267499 Adjacent sequences:  A003058 A003059 A003060 * A003062 A003063 A003064 KEYWORD nonn,nice,more,hard AUTHOR EXTENSIONS a(8) corrected and a(9)-a(12) from Michael Somos, Aug 10 2010 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.

Last modified December 8 14:38 EST 2019. Contains 329865 sequences. (Running on oeis4.)