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A116027 Numbers k such that k + phi(k) + phi(phi(k)) is a repdigit. 0

%I

%S 1,2,3,4,5,6,14,23,28,45,51,55,56,63,161,189,275,543,567,1373,13499,

%T 13642,25963,27284,54568,135347,138587,304779,1296346,2592692,5185384,

%U 45994399,338193377,419192721,1492937222,1724137953,2453038739,2985874444,4687039999

%N Numbers k such that k + phi(k) + phi(phi(k)) is a repdigit.

%e 5185384 + phi(5185384) + phi(phi(5185384)) = 8888888.

%Y Cf. A010785, A116018.

%K nonn,base

%O 1,2

%A _Giovanni Resta_, Feb 13 2006

%E a(32)-a(39) from _Donovan Johnson_, Feb 18 2013

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Last modified May 26 04:43 EDT 2022. Contains 354074 sequences. (Running on oeis4.)