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 A382368 #7 Mar 23 2025 10:08:13
%S A382368 1,2,8,36,162,750,3536,16858,81100,392914,1914268,9369190,46032396,
%T A382368 226898158,1121510176,5556731592,27589816042,137240945530,
%U A382368 683808343416,3412128301538,17048743841882,85286538527304,427112389604968,2141096012912290,10743017708448232
%N A382368 Expansion of 1/( 1 - 4 * Sum_{k>=0} x^(3^k) / (1 - x^(3^k)) )^(1/2).
%F A382368 G.f. A(x) satisfies A(x) = 1/( 1/A(x^3)^2 - 4*x/(1-x) )^(1/2).
%Y A382368 Cf. A382367, A382369.
%K A382368 nonn
%O A382368 0,2
%A A382368 _Seiichi Manyama_, Mar 22 2025