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A072075
Smallest solution to phi(x) = 10^n where phi(x) = A000010(x).
4
1, 11, 101, 1111, 10291, 100651, 1004251, 10165751, 100064101, 1000078501, 10000222501, 100062501601, 1000062516001, 10000062660001, 100002441447211, 1003922328562757, 10000390625025601, 100000002482366251, 1000000002851006251, 10000062500000160001
OFFSET
0,2
LINKS
Max A. Alekseyev, Computing the Inverses, their Power Sums, and Extrema for Euler's Totient and Other Multiplicative Functions. Journal of Integer Sequences, Vol. 19 (2016), Article 16.5.2
EXAMPLE
n=3: a(3)=1111 because InvPhi[1000]= {1111,1255,1375,1875,2008,2222,2500,2510,2750,3012,3750}.
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Jun 13 2002
EXTENSIONS
More terms from Max Alekseyev, Apr 26 2010
a(18)-a(19) from Donovan Johnson, Feb 02 2012
STATUS
approved