OFFSET
1,3
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..10000
PROG
(PARI) A151948(n) = numdiv(sigma(eulerphi(n))); \\ Antti Karttunen, Aug 22 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Jul 20 2009
STATUS
approved