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 A100084 #1 Feb 20 2005 03:00:00
%S A100084 1,2,5,1,3,7,1,7,4,2,1,1,2,4,8,6,4,0,5,9,3,7,2,7,2,7,6,4,8,3,5,6,3,4,
%T A100084 4,3,1,0,6,7,1,5,4,0,7,7,1,8,1,9,2,7,2,9,7,6,6,8,0,3,8,4,0,8,7,7,9,1,
%U A100084 4,9,5,1,9,8,9,0,2,6,0,6,3,1,0,0,2,7,0,0,9,7,0,1,0,8,2,6,7,7,6,9,0,9,6,4
%N A100084 Decimal expansion of Sum_{n>0} 1/(n^(n!)).
%e A100084 1.251371742112486405937272764835634431067154077181927...
%o A100084 (PARI) sum(n=1,9,1/(n^(n!)),0.)
%Y A100084 Cf. A073009, A099870 to A099873.
%K A100084 cons,easy,nonn
%O A100084 1,2
%A A100084 Mark Hudson (mrmarkhudson(AT)hotmail.com), Nov 08 2004