# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a072075 Showing 1-1 of 1 %I A072075 #24 Jul 19 2016 16:22:04 %S A072075 1,11,101,1111,10291,100651,1004251,10165751,100064101,1000078501, %T A072075 10000222501,100062501601,1000062516001,10000062660001, %U A072075 100002441447211,1003922328562757,10000390625025601,100000002482366251,1000000002851006251,10000062500000160001 %N A072075 Smallest solution to phi(x) = 10^n where phi(x) = A000010(x). %H A072075 Ray Chandler, Table of n, a(n) for n = 0..1000 %H A072075 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 %e A072075 n=3: a(3)=1111 because InvPhi[1000]= {1111,1255,1375,1875,2008,2222,2500,2510,2750,3012,3750}. %Y A072075 Cf. A000010, A014573, A014197, A110077, A072074, A072076. %K A072075 nonn %O A072075 0,2 %A A072075 _Labos Elemer_, Jun 13 2002 %E A072075 More terms from _Max Alekseyev_, Apr 26 2010 %E A072075 a(18)-a(19) from _Donovan Johnson_, Feb 02 2012 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE