OFFSET
1,7
EXAMPLE
n=113: reduced residue system consists of 112 numbers: Card[OddNonTotients(113)]=56-1, EvenNonTotients={14,26,34,38,50,62,68,74,76,86,90,94,98}, i.e. 13 terms, therefore a(113)=56-1+13=68=a(113).
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Jun 19 2002
STATUS
approved