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%I #2 Feb 11 2014 19:05:29
%S 1,2,2,2,3,3,3,4,3,5,5,6,5,5,8,8,9,6,7,10,7,9,11,12,10,9,9,9,13,15,9,
%T 16,14,17,12,12,13,13,13,20,17,14,13,18,15,21,23,24,14,20,26,17,25,18,
%U 22,19,19,25,29,30,17,17,21,32,22,26,21,34,32,23,25,24,25,25,30,25,21
%N Number of positive integers not exceeding n that are relatively prime to phi(n).
%e Among the positive integers not exceeding 12, the six numbers 1,3,5,7,9,11 are relatively prime to phi(12)=4. Hence a(12)=6.
%t r = {}; Do[s = EulerPhi[n]; j = 0; For[i = 1, i <= n, i++, If[GCD[s, i] == 1, j++ ]]; r = Append[r, j], {n, 1, 10^2}]; r
%K nonn
%O 1,2
%A _Joseph L. Pe_, Jul 14 2002
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