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 A349925 #5 Dec 18 2021 15:09:25
%S A349925 1,-2,-2,-2,-2,2,-2,2,-2,2,-2,6,-2,2,2,2,-2,6,-2,6,2,2,-2,2,-2,2,2,6,
%T A349925 -2,2,-2,6,2,2,2,2,-2,2,2,2,-2,2,-2,6,6,2,-2,-2,-2,6,2,6,-2,2,2,2,2,2,
%U A349925 -2,-6,-2,2,6,-2,2,2,-2,6,2,2,-2,-6,-2,2,6
%N A349925 Dirichlet g.f.: Product_{k>=2} (1 - 2 * k^(-s)).
%Y A349925 Cf. A070877, A114592, A226177, A339701, A349926.
%K A349925 sign
%O A349925 1,2
%A A349925 _Ilya Gutkovskiy_, Dec 05 2021