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 A303394 #9 Apr 23 2018 18:51:57
%S A303394 1,-2,-6,-28,-26,-156,-476,968,11526,-16172,139724,791928,1315548,
%T A303394 12772840,31004424,-105335920,1058225606,2239259700,-3700870212,
%U A303394 29301955992,-4944685836,-526686535112,1134044530040,4057865621232,-13063873857124,-113573062924024
%N A303394 Expansion of Product_{n>=1} ((1 - (4*x)^n)/(1 + (4*x)^n))^(1/4).
%o A303394 (PARI) N=66; x='x+O('x^N); Vec(prod(k=1, N, ((1-(4*x)^k)/(1+(4*x)^k))^(1/4)))
%Y A303394 Expansion of Product_{n>=1} ((1 + (2^b*x)^n)/(1 - (2^b)*x^n))^(1/(2^b)): A002448 (b=0), A303306 (b=1), this sequence (b=2), A303395 (b=3).
%Y A303394 Cf. A303361.
%K A303394 sign
%O A303394 0,2
%A A303394 _Seiichi Manyama_, Apr 23 2018