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 A239528 #10 Jun 05 2021 17:40:55
%S A239528 1,1,9,9,7,6,5,1,2,7,4,8,0,7,7,8,9,6,7,3,0,4,9,8,4,0,0,4,3,1,2,9,2,0,
%T A239528 7,6,2,8,2,0,7,0,5,1,9,3,3,4,7,8,6,3,4,7,1,6,2,0,7,7,4,0,4,9,6,9,2,7,
%U A239528 1,4,7,6,2,0,7,5,6,3,4,7,4,8,1,7,2,5,9,1,4,4,0,6,7,9,3,1,5,4,2,8,0,2,1,9,0,7
%N A239528 Decimal expansion of a constant related to A048285.
%H A239528 J. G. Penaud and O. Roques, <a href="https://dx.doi.org/10.1016/S0012-365X(01)00261-8">Génération de chemins de Dyck à pics croissants</a>, Discrete Mathematics, Vol. 246, no. 1-3 (2002), 255-267.
%F A239528 Equals lim n->infinity A048285(n)/((3+sqrt(5))/2)^n.
%e A239528 0.11997651274807789673049840043129207628207...
%t A239528 RealDigits[N[(Sqrt[5]-3)/(Sqrt[5]-5)*Sum[(-1)^k*x^(2*k)/Product[(1-x)*(1-x^i)-x,{i,2,k+1}],{k,0,300}]/.x->(3-Sqrt[5])/2,60]][[1]]
%Y A239528 Cf. A048285.
%K A239528 nonn,cons
%O A239528 0,3
%A A239528 _Vaclav Kotesovec_, Mar 21 2014