OFFSET
1,2
LINKS
Donovan Johnson, Table of n, a(n) for n = 1..500
EXAMPLE
phi(reverse(168)) = phi(861) = 480 = sigma(168), so 168 is a term of the sequence.
MATHEMATICA
Select[Range[10^5], EulerPhi[FromDigits[Reverse[IntegerDigits[ # ]]]] == DivisorSigma[1, # ] &]
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Joseph L. Pe, May 16 2002
EXTENSIONS
More terms from Labos Elemer, Jul 04 2003
STATUS
approved