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 A339707 #4 Dec 14 2020 10:29:03
%S A339707 1,-8,-8,20,-8,56,-8,0,20,56,-8,-104,-8,56,56,-70,-8,-104,-8,-104,56,
%T A339707 56,-8,-104,20,56,0,-104,-8,-328,-8,64,56,56,56,36,-8,56,56,-104,-8,
%U A339707 -328,-8,-104,-104,56,-8,456,20,-104,56,-104,-8,-104,56,-104,56,56,-8,344,-8,56,-104,56,56
%N A339707 Dirichlet g.f.: Product_{k>=2} (1 - k^(-s))^8.
%F A339707 a(1) = 1; a(n) = -Sum_{d|n, d < n} A339323(n/d) * a(d).
%F A339707 a(p^k) = A000731(k) for prime p.
%Y A339707 Cf. A000731, A114592, A339323, A339701, A339702, A339703, A339704, A339705, A339706.
%K A339707 sign
%O A339707 1,2
%A A339707 _Ilya Gutkovskiy_, Dec 13 2020