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 A339735 #4 Dec 15 2020 09:08:28
%S A339735 1,-9,-9,36,-9,72,-9,-93,36,72,-9,-252,-9,72,72,207,-9,-252,-9,-252,
%T A339735 72,72,-9,585,36,72,-93,-252,-9,-495,-9,-459,72,72,72,765,-9,72,72,
%U A339735 585,-9,-495,-9,-252,-252,72,-9,-1278,36,-252,72,-252,-9,585,72,585,72,72,-9,1449
%N A339735 Dirichlet g.f.: Product_{k>=2} 1 / (1 + k^(-s))^9.
%F A339735 a(1) = 1; a(n) = -Sum_{d|n, d < n} A339341(n/d) * a(d).
%F A339735 a(p^k) = A022604(k) for prime p.
%Y A339735 Cf. A022604, A316441, A339341, A339717, A339718, A339719, A339720, A339721, A339722, A339734.
%K A339735 sign
%O A339735 1,2
%A A339735 _Ilya Gutkovskiy_, Dec 14 2020