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 A100126 #8 Mar 23 2025 18:40:22
%S A100126 8,5,9,1,2,7,1,1,0,3,5,1,0,8,8,4,3,0,3,6,8,2,2,8,2,6,2,3,0,7,5,3,7,9,
%T A100126 0,8,2,5,8,5,3,4,5,7,7,0,6,1,7,7,6,1,7,5,6,6,1,6,7,6,1,7,7,5,8,6,8,3,
%U A100126 7,3,2,7,9,8,0,3,7,3,5,8,8,9,7,5,1,3,2,2,0,2,2,4,8,2,6,2,5,6,3,9
%N A100126 Decimal expansion of Sum_{n>0} n/(prime(n)!).
%e A100126 0.8591271103510884303682282623075379082585345770617761756616761775868373279803735889751322022482625639...
%t A100126 RealDigits[Total[Table[n/Prime[n]!,{n,20}]],10,120][[1]] (* _Harvey P. Dale_, Oct 26 2015 *)
%o A100126 (PARI) default(realprecision,100);sum(n=1,100,n/(prime(n)!),0.)
%Y A100126 Cf. A094289, A100124.
%K A100126 cons,nonn
%O A100126 0,1
%A A100126 Mark Hudson (mrmarkhudson(AT)hotmail.com), Nov 11 2004