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%I #17 Apr 22 2020 07:59:25
%S 1,-1,0,3,-8,12,-6,-37,208,-730,1708,-1278,-10018,56782,-163644,
%T 229985,389830,-3724538,13460550,-28799694,12470564,205544596,
%U -1084748334,3195484242,-4851317704,-7421547798,81343472008
%N Reversion of Euler totient function A000010.
%H N. J. A. Sloane, <a href="/transforms.txt">Transforms</a>
%H <a href="/index/Res#revert">Index entries for reversions of series</a>
%F G.f. A(x) satisfies: A(x) = x - Sum_{k>=2} phi(k) * A(x)^k. - _Ilya Gutkovskiy_, Apr 22 2020
%o (PARI) Vec(serreverse(sum(n=1, 50, moebius(n)*x^n/(1-x^n)^2 + O(x^50)))) \\ _Michel Marcus_, Sep 25 2017
%Y Cf. A000010, A050392.
%K sign
%O 1,4
%A _Christian G. Bower_, Nov 15 1999
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