A072075 Smallest solution to phi(x) = 10^n where phi(x) = A000010(x).

1, 11, 101, 1111, 10291, 100651, 1004251, 10165751, 100064101, 1000078501, 10000222501, 100062501601, 1000062516001, 10000062660001, 100002441447211, 1003922328562757, 10000390625025601, 100000002482366251, 1000000002851006251, 10000062500000160001

Offset

0,2

Links

Ray Chandler, Table of n, a(n) for n = 0..1000

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

Cf. A000010, A014573, A014197, A110077, A072074, A072076.

Sequence in context: A284479 A290661 A097649 * A290294 A289043 A289880

Adjacent sequences: A072072 A072073 A072074 * A072076 A072077 A072078

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