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 A132137 #2 Mar 30 2012 17:26:23
%S A132137 1,1,2,4,8,6,2,4,8,6,4,6,5,7,6,7,7,8,9,1,2,4,8,6,2,4,8,6,4,6,5,7,6,7,
%T A132137 7,8,9,2,3,6,2,4,8,6,3,5,4,4,8,6,6,8,7,8,9,3,3,6,3,5,3,3,6,3,5,4,4,8,
%U A132137 6,6,8,7,8,9,4,4,8,6,4,6,4,6,4,6,5,7,6,7,7,8,9,5,6,5,7,5,9,8,6,5,7,6,7,7,8
%N A132137 a(1)=1, a(n)=maximal digit of sum a(1)+...+a(n-1).
%t A132137 a[1]=i=s=1;Do[i++;b=0+Max[IntegerDigits[s]];a[i]=b;s+=b,{225}] Table[a[k],{k,i}]
%Y A132137 Cf. A134548.
%K A132137 base,nonn
%O A132137 1,3
%A A132137 _Zak Seidov_, Oct 31 2007