OFFSET
1,6
EXAMPLE
a(6) = 5 because Fibonacci number F(6) = 8 and there are 5 groups of order 8.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Jonathan Vos Post, Jul 28 2008
EXTENSIONS
Entries through a(17) checked by N. J. A. Sloane, Aug 01 2008
a(18)-a(23) from Eric M. Schmidt, Jun 19 2014
STATUS
approved