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 A371549 #8 Mar 30 2024 02:33:05
%S A371549 1,1,3,10,46,241,1557,11131,92212,840024,8542993,94539006,1144279566,
%T A371549 14919897227,209774942457,3151449855040,50530826165712,
%U A371549 859682757161697,15490902162445818,294439841770813162,5891955981426042936,123754936144549505365,2723338451934477621489
%N A371549 Expansion of e.g.f. Product_{k>=1} 1 / (1 - mu(k)^2*x^k/k!).
%F A371549 a(n) ~ c * n!, where c = Product_{k>=2} 1/(1 - mu(k)^2 / k!) = 2.424015771296779544901862396932865784522634598161012752425646675020312449... - _Vaclav Kotesovec_, Mar 28 2024
%t A371549 nmax = 22; CoefficientList[Series[Product[1/(1 - MoebiusMu[k]^2 x^k/k!), {k, 1, nmax}], {x, 0, nmax}], x] Range[0, nmax]!
%Y A371549 Cf. A005117, A005651, A008683, A073576, A294531, A351991, A371550.
%K A371549 nonn
%O A371549 0,3
%A A371549 _Ilya Gutkovskiy_, Mar 27 2024