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 A292138 #10 Sep 09 2017 12:02:32
%S A292138 0,-1,-1,0,0,0,1,2,2,2,2,3,3,2,2,2,1,-1,-2,-2,-4,-6,-7,-8,-10,-13,-14,
%T A292138 -14,-15,-17,-17,-15,-15,-16,-14,-10,-8,-6,-1,5,10,14,21,31,38,43,53,
%U A292138 64,71,77,86,97,104,108,115,124,127,125,127,130,125,116,110,103,89
%N A292138 G.f.: Im(1/(-i*x; x)_inf), where (a; q)_inf is the q-Pochhammer symbol, i = sqrt(-1).
%F A292138 1/(-i*x; x)_inf is the g.f. for A292136(n) + i*a(n).
%F A292138 a(n) = -A292137(n).
%e A292138 Product_{k>=1} 1/(1 + i*x^k) = 1 + (0-1i)*x + (-1-1i)*x^2 + (-1+0i)*x^3 + (-1+0i)*x^4 + (-1+0i)*x^5 + (-2+1i)*x^6 + (-1+2i)*x^7 + ...
%Y A292138 Cf. A292042, A292052, A292136, A292137.
%K A292138 sign
%O A292138 0,8
%A A292138 _Seiichi Manyama_, Sep 09 2017