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Expansion of the series reversion of g.f. for the nonprime numbers (A018252).
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%I #4 Aug 25 2017 23:37:34

%S 1,-4,26,-208,1859,-17790,178308,-1847882,19640154,-212911066,

%T 2345049018,-26168243862,295214515662,-3361428239216,38580429168968,

%U -445874925644701,5184317812361117,-60603410700370525,711826341810784570,-8396670336877539127,99428914632341468974

%N Expansion of the series reversion of g.f. for the nonprime numbers (A018252).

%H N. J. A. Sloane, <a href="/transforms.txt">Transforms</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/SeriesReversion.html">Series Reversion</a>

%H <a href="/index/Res#revert">Index entries for reversions of series</a>

%F G.f. A(x) satisfies: A(x) + 4*A(x)^2 + 6*A(x)^3 + 8*A(x)^4 + 9*A(x)^5 + 10*A(x)^6 + 12*A(x)^7 + ... = x.

%Y Cf. A007296, A018252.

%K sign

%O 1,2

%A _Ilya Gutkovskiy_, Aug 25 2017