login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A083280 Number of 2-generator non-Abelian groups of order n. 1
0, 0, 0, 0, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 6, 0, 2, 0, 3, 1, 1, 0, 11, 0, 1, 2, 2, 0, 3, 0, 17, 0, 1, 0, 8, 0, 1, 1, 10, 0, 5, 0, 2, 0, 1, 0, 32, 0, 2, 0, 3, 0, 8, 1, 9, 1, 1, 0, 11, 0, 1, 2, 50, 0, 3, 0, 3, 0, 3, 0, 33, 0, 1, 1, 2, 0, 5, 0, 32, 7, 1, 0, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

Eric M. Schmidt, Table of n, a(n) for n = 1..1023

FORMULA

a(n) = A066389(n) - A046951(n).

CROSSREFS

Cf. A066389, A046951.

Sequence in context: A191255 A007814 A225345 * A060689 A053119 A162515

Adjacent sequences:  A083277 A083278 A083279 * A083281 A083282 A083283

KEYWORD

nonn

AUTHOR

Yuval Dekel (dekelyuval(AT)hotmail.com), Jun 02 2003

EXTENSIONS

More terms from Eric M. Schmidt, May 05 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified November 29 00:35 EST 2014. Contains 250479 sequences.