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 A235352 #19 Jul 21 2023 09:34:11 %S A235352 1,-2,14,-130,1382,-15906,192894,-2427522,31405430,-415086658, %T A235352 5580629870,-76080887042,1049295082630,-14613980359010, %U A235352 205246677882078,-2903566870820610,41337029956899222,-591796707042765954,8514525059135909070,-123048063153362454402 %N A235352 Series reversion of x*(1+3*x^2)/(1+x^2) in odd-power terms. %C A235352 Conjugate turbulence sequence to A235347. %H A235352 Georg Fischer, <a href="/A235352/b235352.txt">Table of n, a(n) for n = 0..1000</a> (first 939 terms from _Fung Lam_) %F A235352 D-finite with recurrence 12*n*(2*n+1)*a(n) +(382*n^2-391*n+90)*a(n-1) +3*(34*n^2-132*n+125)*a(n-2) +(2*n-5)*(n-3)*a(n-3)=0. - _R. J. Mathar_, Mar 24 2023 %Y A235352 Cf. A235347. %K A235352 sign,easy %O A235352 0,2 %A A235352 _Fung Lam_, Jan 16 2014