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 A248760 #13 Nov 15 2020 03:10:21
%S A248760 3,6,8,7,3,7,8,2,0,2,9,4,6,4,9,9,0,4,0,8,9,7,7,7,2,9,6,1,6,5,7,4,0,3,
%T A248760 4,2,0,9,8,3,7,1,9,7,8,8,1,4,6,9,8,4,9,1,0,6,8,7,8,2,5,7,4,5,8,9,0,5,
%U A248760 9,0,1,7,3,5,7,9,6,1,9,0,0,6,7,1,5,4
%N A248760 Decimal expansion of sum_{n >= 1} (2n)!/(3n)!.
%e A248760 0.368737820294649904089777296165740342098371978814698491068782574589059...
%p A248760 evalf(sum((2n)!/(3n)!, n=1..infinity), 120); # _Vaclav Kotesovec_, Oct 19 2014
%t A248760 u = N[Sum[(2 n)!/(3 n)!, {n, 1, 300}], 120]
%t A248760 RealDigits[u] (* A248760 *)
%t A248760 N[HypergeometricPFQ[{1, 3/2}, {4/3, 5/3}, 4/27]/3, 120] (* _Vaclav Kotesovec_, Nov 15 2020 *)
%o A248760 (PARI) suminf(n=1, (2*n)!/(3*n)!) \\ _Michel Marcus_, Oct 19 2014
%Y A248760 Cf. A214869, A248696, A248759, A248761.
%K A248760 nonn,easy,cons
%O A248760 0,1
%A A248760 _Clark Kimberling_, Oct 13 2014