This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A050398 #16 May 06 2023 23:08:06 %S A050398 1,-2,8,-50,434,-4864,66996,-1095324,20724756,-445310616,10708301328, %T A050398 -284863999848,8304979127496,-263299784899488,9018495674420592, %U A050398 -331867682445078000,13057137391032043920,-546957850901539335840 %N A050398 Exponential reversion of sequence of involutions (A000085). %H A050398 Andrew Howroyd, <a href="/A050398/b050398.txt">Table of n, a(n) for n = 1..200</a> %H A050398 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %H A050398 <a href="/index/Res#revert">Index entries for reversions of series</a> %F A050398 E.g.f. A(x) satisfies: A(x) = log(1 + x) - A(x)^2/2. - _Ilya Gutkovskiy_, Apr 23 2020 %o A050398 (PARI) seq(n)=Vec(serlaplace(serreverse(-1 + exp(x+x^2/2 + O(x*x^n))))) \\ _Andrew Howroyd_, May 06 2023 %Y A050398 Cf. A000085, A050397. %K A050398 sign %O A050398 1,2 %A A050398 _Christian G. Bower_, Nov 15 1999