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 A382189 #7 Mar 18 2025 21:44:10
%S A382189 1,2,6,22,82,312,1210,4752,18834,75186,301868,1217664,4930918,
%T A382189 20033432,81621456,333357656,1364395770,5594799576,22980090870,
%U A382189 94529049296,389367825444,1605758772136,6629456308464,27397510466856,113329594803078,469183242566016,1943927996932656
%N A382189 Expansion of 1/(1 - 4 * Sum_{k>=0} x^(3^k))^(1/2).
%F A382189 G.f. A(x) satisfies A(x) = 1/(1/A(x^3)^2 - 4*x)^(1/2).
%Y A382189 Cf. A078932, A382190.
%K A382189 nonn,easy
%O A382189 0,2
%A A382189 _Seiichi Manyama_, Mar 18 2025