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A049454 1+Sum_{i=1..n} phi(i)^2. 0


%S 1,2,3,7,11,27,31,67,83,119,135,235,251,395,431,495,559,815,851,1175,

%T 1239,1383,1483,1967,2031,2431,2575,2899,3043,3827,3891,4791,5047,

%U 5447,5703,6279,6423,7719,8043,8619,8875,10475,10619,12383

%N 1+Sum_{i=1..n} phi(i)^2.

%Y Cf. A005728.

%K nonn

%O 0,2

%A _N. J. A. Sloane_.

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Last modified January 17 12:42 EST 2020. Contains 330958 sequences. (Running on oeis4.)