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 A288239 #6 Aug 28 2021 04:47:18
%S A288239 1,9,8,7,8,4,4,5,1,7,5,0,0,9,7,0,2,1,3,2,0,8,5,9,5,2,9,7,1,2,2,2,4,8,
%T A288239 2,4,2,8,5,1,4,1,9,5,8,8,4,5,8,3,7,6,7,7,9,8,0,8,2,6,9,4,8,9,4,1,0,4,
%U A288239 6,6,5,5,2,7,1,4,3,7,9,6,1,2,3,8,6,1
%N A288239 Decimal expansion of the limiting ratio of consecutive terms of A288229.
%e A288239 1.9878445175009702132085952971222...
%t A288239 z = 2000; r = Pi/2;
%t A288239 u = CoefficientList[Series[1/Sum[Floor[(k + 1)*r] (-x)^k, {k, 0, z}], {x, 0, z}], x]; (* A288229 *)
%t A288239 v = N[u[[z]]/u[[z - 1]], 200]
%t A288239 RealDigits[v, 10][[1]](* A288239 *)
%Y A288239 Cf. A288229, A078140 (includes guide to related constants).
%K A288239 nonn,cons,easy
%O A288239 1,2
%A A288239 _Clark Kimberling_, Jul 11 2017