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 A238272 #15 Jul 07 2023 13:34:41
%S A238272 8,8,9,9,0,9,0,0,0,8,9,9,1,0,9,8,9,9,0,1,0,9,0,0,0,9,9,8,8,9,0,1,1,0,
%T A238272 9,9,1,0,9,8,8,9,0,0,0,9,0,0,0,0,9,9,0,1,0,1,0,8,9,9,1,0,0,0,8,9,0,0,
%U A238272 8,8,9,9,1,0,0,0,8,9,0,0,0,9,0,1,1,0,9,9,0,1,0,1,1,0,9,8,9,9,9,8,8,8,9,9,0
%N A238272 Duplicate of A181673.
%C A238272 Suggested by a posting to SeqFan list by Alonso Del Arte at 15:35 on Aug 09 2012.
%e A238272 =0.08899090008991098990109000998890110991098890009000099010108991000890...
%t A238272 RealDigits[ Sum[ N[ MoebiusMu[n] 10^-n, 128], {n, 120}], 10, 111][[1]]
%K A238272 dead
%O A238272 0,1
%A A238272 _Robert G. Wilson v_, Feb 21 2014