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 A303662 #4 Apr 28 2018 04:15:48
%S A303662 1,0,5,9,2,5,4,7,1,3,6,4,9,8,7,4,5,2,2,2,2,2,6,5,6,2,0,5,8,8,4,2,8,4,
%T A303662 1,1,4,9,6,7,3,2,1,2,3,4,2,7,9,8,2,7,2,3,5,3,2,3,3,6,6,1,5,8,0,1,3,9,
%U A303662 7,5,3,6,2,2,1,5,2,4,0,4,3,2,7,3,1,8,9,5,9,5,4,0,0,9,6,8,4,7,5,9,9,3,9,9,3,4
%N A303662 Decimal expansion of Sum_{k>=1} 1/A015128(k).
%H A303662 Vaclav Kotesovec, <a href="/A303662/b303662.txt">Table of n, a(n) for n = 1..1850</a>
%e A303662 1.059254713649874522222656205884284114967321234279827235323366158...
%Y A303662 Cf. A078506, A237515.
%K A303662 nonn,cons
%O A303662 1,3
%A A303662 _Vaclav Kotesovec_, Apr 28 2018