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 A291533 #5 Feb 16 2025 08:33:50 %S A291533 1,-4,26,-208,1859,-17790,178308,-1847882,19640154,-212911066, %T A291533 2345049018,-26168243862,295214515662,-3361428239216,38580429168968, %U A291533 -445874925644701,5184317812361117,-60603410700370525,711826341810784570,-8396670336877539127,99428914632341468974 %N A291533 Expansion of the series reversion of g.f. for the nonprime numbers (A018252). %H A291533 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %H A291533 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SeriesReversion.html">Series Reversion</a> %H A291533 <a href="/index/Res#revert">Index entries for reversions of series</a> %F A291533 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 A291533 Cf. A007296, A018252. %K A291533 sign %O A291533 1,2 %A A291533 _Ilya Gutkovskiy_, Aug 25 2017