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A069063 Composite k such that A029939(k) > k*(k+1)/2 where A029939(k) = Sum_{d|k} phi(d)^2. 0

%I #10 Mar 31 2024 23:51:59

%S 25,49,55,65,69,77,85,87,91,93,95,111,115,119,121,123,125,129,133,141,

%T 143,145,155,159,161,169,175,177,183,185,187,201,203,205,209,213,215,

%U 217,219,221,235,237,245,247,249,253,259,265,267,275,287,289,291,295

%N Composite k such that A029939(k) > k*(k+1)/2 where A029939(k) = Sum_{d|k} phi(d)^2.

%Y Cf. A029939.

%K easy,nonn

%O 1,1

%A _Benoit Cloitre_, Apr 04 2002

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Last modified April 25 09:38 EDT 2024. Contains 371967 sequences. (Running on oeis4.)