OFFSET
1,2
LINKS
Donovan Johnson, Table of n, a(n) for n = 1..1000
EXAMPLE
sigma(reverse(120)) = sigma(21) = 32 = phi(120), so 120 is a term of the sequence.
MATHEMATICA
Select[ Range[ 10^6 ], EulerPhi[ # ]==DivisorSigma[ 1, FromDigits[ Reverse[ IntegerDigits[ # ] ] ] ]& ]
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Joseph L. Pe, May 16 2002
EXTENSIONS
Extended by Ray Chandler, Feb 10 2009
STATUS
approved