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 A049189 #11 Jul 27 2023 13:17:31 %S A049189 1,1,3,11,43,183,813,3731,17563,84303,411093,2030833,10141953, %T A049189 51117801,259695379,1328454221,6836777765,35373248213,183892104895, %U A049189 960066929119,5031617143079,26462109374051,139609962072913,738695107457919 %N A049189 Revert transform of 2*x*(1 - x)*(1-x^3-x^5)-x/(1+x). %C A049189 Sign diagram of generating sequence: +++-++++--------... %H A049189 <a href="/index/Res#revert">Index entries for reversions of series</a> %p A049189 Order := 80: %p A049189 g := 2*x*(1-x)*(1-x^3-x^5)-x/(1+x) ; %p A049189 solve(series(g, x)=y, x) : %p A049189 convert(%, polynom) : %p A049189 seq(coeff(%, y, i), i=0..Order-1) ; # _R. J. Mathar_, Jul 24 2023 %Y A049189 Cf. A049186. %K A049189 nonn %O A049189 1,3 %A A049189 _Olivier Gérard_ %E A049189 NAME corrected. - _R. J. Mathar_, Jul 24 2023