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%I #21 Jun 15 2024 05:48:43
%S 2,4,6,6,10,12,6,8,16,18,12,22,20,12,18,28,30,20,16,24,36,18,24,40,42,
%T 24,46,42,20,32,52,40,36,58,60,30,36,48,66,32,44,70,72,36,40,36,60,78,
%U 54,82,64,42,56,88,24,72,60,46,72,96,42,60,100,102,48,106
%N Totients of nontotient numbers.
%C See comment at analogous sequence A053474.
%H Amiram Eldar, <a href="/A053568/b053568.txt">Table of n, a(n) for n = 1..10000</a>
%F a(n) = A000010(A007617(n)).
%e If k = 19 then there is no number x such that phi(x) = k exists; however, phi(19) = 18.
%e k = 27 is also a nontotient number whose totient is 18.
%o (PARI) lista(nn) = for (n=1, nn, if (!istotient(n), print1(eulerphi(n), ", "))); \\ _Michel Marcus_, Nov 20 2017
%Y Cf. A000010, A007617, A053474.
%K nonn
%O 1,1
%A _Labos Elemer_, Jan 17 2000
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