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 A238273 #16 Jul 01 2025 14:46:00
%S A238273 7,1,2,6,6,3,1,8,2,2,6,4,2,8,3,4,5,7,1,2,1,6,0,4,1,6,8,3,2,1,8,6,1,2,
%T A238273 5,0,6,0,5,3,0,7,0,2,1,7,4,7,1,6,1,3,6,9,0,7,0,3,5,0,5,0,6,3,2,9,5,5,
%U A238273 5,6,6,1,2,1,0,4,4,7,0,6,1,4,3,6,4,1,1,4,6,2,7,0,5,9,4,3,6,2,7,6,2,1,6,0,8
%N A238273 Decimal expansion of the Sum_{n>=1} mu(n)/n^n where mu is the Moebius function.
%C A238273 Suggested by a posting to SeqFan list by Alonso Del Arte at 15:35 on Aug 09 2012.
%e A238273 0.71266318226428345712160416832186125060530702174716136907035050632955566121...
%t A238273 RealDigits[ Sum[ N[ MoebiusMu[n] 1 n^-n, 128], {n, 100}], 10, 111][[1]]
%Y A238273 Cf. A008683, A238270, A238271 & A181673.
%K A238273 nonn,cons,easy
%O A238273 0,1
%A A238273 _Robert G. Wilson v_, Feb 21 2014