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 A382190 #9 Mar 18 2025 16:23:45 %S A382190 1,3,18,129,981,7749,62766,517401,4320864,36446565,309876444, %T A382190 2651681826,22812645339,197144727876,1710267824304,14886242261595, %U A382190 129946357148661,1137235357935279,9975129925544568,87672540348112779,771962724133452441,6808329943495097076 %N A382190 Expansion of 1/(1 - 9 * Sum_{k>=0} x^(3^k))^(1/3). %F A382190 G.f. A(x) satisfies A(x) = 1/(1/A(x^3)^3 - 9*x)^(1/3). %Y A382190 Cf. A078932, A382189. %Y A382190 Cf. A382196. %K A382190 nonn,easy %O A382190 0,2 %A A382190 _Seiichi Manyama_, Mar 18 2025