OFFSET
1,3
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..1000
PROG
(GAP) List([1..80], n->Sum( ConjugacyClasses( AutomorphismGroup( CyclicGroup(n))), x->Size(x)/Phi(Order( Representative(x)))));
(PARI) a(n)={sum(i=1, n, if(gcd(i, n)==1, 1/eulerphi(znorder(Mod(i, n)))))} \\ Andrew Howroyd, Jul 01 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Sharon Sela (sharonsela(AT)hotmail.com), Jan 08 2002
EXTENSIONS
a(32)-a(33) inserted and terms a(37) and beyond from Andrew Howroyd, Jul 01 2018
STATUS
approved