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 A347899 #8 Sep 18 2021 11:38:07
%S A347899 1,1,1,2,-1,-6,109,1154,-2507,18392,829181,6383244,-2209703,
%T A347899 -107812394,4571476337,317794760230,2764096980201,-15873576166552,
%U A347899 100411162138201,7249400365091352,111212112152829597,8121369858513002698,171335979252872509109,502729844835525379706
%N A347899 E.g.f.: Product_{k>=1} (1 + x^k)^(cos(x)/k).
%o A347899 (PARI) N=40; x='x+O('x^N); Vec(serlaplace(prod(k=1, N, (1+x^k)^(cos(x)/k))))
%Y A347899 Cf. A347898, A347900.
%K A347899 sign
%O A347899 0,4
%A A347899 _Seiichi Manyama_, Sep 18 2021