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 A343428 #26 Apr 16 2021 08:51:02
%S A343428 1,1,-2,16,-416,47104,-31623680,151868796928,-5929687248674816,
%T A343428 2103645975156790263808,-7506342628191723555983065088,
%U A343428 295743482602620866090259230372134912,-140189608695401234244797733914829257462251520,865523452956329002149153403380412177220307414830546944
%N A343428 G.f.: 1 + 1!*x/(1 + 2!*x/(1 + 3!*x/(1 + 4!*x/(1 + 5!*x/(1 + ...))))).
%H A343428 Seiichi Manyama, <a href="/A343428/b343428.txt">Table of n, a(n) for n = 0..43</a>
%F A343428 G.f.: 1/(Sum_{k>=0} A285380(k) * (-x)^k).
%o A343428 (PARI) a(n) = my(A=1+O(x)); for(i=1, n, A=1+(n-i+1)!*x/A); polcoef(A, n);
%Y A343428 Cf. A000698, A285380, A343427.
%K A343428 sign
%O A343428 0,3
%A A343428 _Seiichi Manyama_, Apr 15 2021