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 A294620 #12 Nov 08 2017 09:17:06
%S A294620 1,-1,-2,-1,-3,7,-12,32,-10,-15,77,187,-760,846,1382,-4197,1371,6650,
%T A294620 -9991,19220,-32439,-80889,290596,127853,-1372003,913414,3253746,
%U A294620 -6728692,2302327,14461937,-46087740,66588519,15702643,-357119564,752905288,310992687
%N A294620 Expansion of Product_{k>0} (1 - k^2*x^k)^(1/k).
%H A294620 Seiichi Manyama, <a href="/A294620/b294620.txt">Table of n, a(n) for n = 0..3155</a>
%F A294620 a(0) = 1 and a(n) = -(1/n) * Sum_{k=1..n} A073705(k)*a(n-k) for n > 0.
%o A294620 (PARI) N=66; x='x+O('x^N); Vec(prod(k=1, N, (1-k^2*x^k)^(1/k)))
%Y A294620 Cf. A073705, A151954.
%K A294620 sign
%O A294620 0,3
%A A294620 _Seiichi Manyama_, Nov 05 2017