OFFSET
1,2
COMMENTS
This comment is about the three sequences A001034, A060793, A056866: The Feit-Thompson theorem says that a finite group with odd order is solvable, hence all numbers in this sequence are even. - Ahmed Fares (ahmedfares(AT)my-deja.com), May 08 2001 [Corrected by Isaac Saffold, Aug 09 2021]
REFERENCES
D. Holt and W. Plesken, Perfect Groups, Oxford University Press, 1989.
LINKS
Eric M. Schmidt, Table of n, a(n) for n = 1..300
Walter Feit, J. G. Thompson, A solvability criterion for finite groups and some consequences, Proc. N. A. S. 48 (6) (1962) 968.
EXAMPLE
A_{5} is perfect since it is equivalent to A_{5}'.
PROG
(GAP) SizesPerfectGroups(); # Eric M. Schmidt, Nov 14 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Ahmed Fares (ahmedfares(AT)my-deja.com), Apr 26 2001
STATUS
approved