OFFSET
1,2
LINKS
FORMULA
From Antti Karttunen, May 26 2017: (Start)
a(A000040(n)) = A084921(n). - after Enrique Pérez Herrero's May 17 2012 comment in the latter sequence.
(End)
PROG
(PARI) A009286(n) = lcm(sigma(n), eulerphi(n)); \\ Antti Karttunen, May 26 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved