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%I #14 Apr 22 2020 07:59:19
%S 1,-2,6,-23,102,-494,2530,-13456,73539,-410282,2326674,-13371039,
%T 77697536,-455749550,2694915548,-16047294182,96143497559,
%U -579147165864,3505497238320,-21309996083015,130048125280624
%N Reversion of divisor function A000005.
%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} d(k) * A(x)^k. - _Ilya Gutkovskiy_, Apr 22 2020
%Y Cf. A000005, A050390.
%K sign
%O 1,2
%A _Christian G. Bower_, Nov 15 1999