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 A327686 #10 May 06 2021 03:15:32
%S A327686 1,-1,0,0,-1,0,1,0,0,0,-1,0,2,0,0,-1,0,1,0,-2,-2,4,1,0,1,-6,2,3,-2,-2,
%T A327686 -2,2,3,2,-1,-3,3,-1,-1,0,-7,3,7,-4,0,1,-1,3,4,-5,-3,5,-3,-3,5,-3,0,3,
%U A327686 -8,-3,11,-3,1,7,-5,12,-2,-17,-3,5,9,-12,6,-12,-1,34,-26
%N A327686 Expansion of Product_{k>=1} 1/(1 + x^k/(1 + x^(2*k)/(1 + x^(3*k)))).
%t A327686 m = 76; CoefficientList[Series[Product[1/(1 + x^k/(1 + x^(2*k)/(1 + x^(3*k)))), {k, 1, m}], {x, 0, m}], x] (* _Amiram Eldar_, May 06 2021 *)
%o A327686 (PARI) N=66; x='x+O('x^N); Vec(1/prod(k=1, N, 1+x^k/(1+x^(2*k)/(1+x^(3*k)))))
%Y A327686 Cf. A307757, A327688.
%K A327686 sign
%O A327686 0,13
%A A327686 _Seiichi Manyama_, Sep 22 2019