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 A062522 #4 Mar 30 2012 17:30:32
%S A062522 8,0,2,5,11,1,4,7,7,8,14,23,3,30,12,6,20,15,22,9,13,33,13,22,12,2,18,
%T A062522 37,11,17,15,5,19,35,19,14,20,21,18,8,12,12,37,20,12,17,18,21,11,26,
%U A062522 23,14,16,9,30,23,6,15,16,24,24,14,4,19,20,10,31,20,21,18,13,21,18,19,20
%N A062522 5^a(n) is smallest nonnegative power of 5 containing the string 'n'.
%C A062522 Table[k = 0; While[ StringPosition[ ToString[5^k], ToString[n]] == {}, k++ ]; k, {n, 0, 75} ]
%Y A062522 Cf. A030000. Essentially the same as A063568.
%K A062522 base,nonn
%O A062522 0,1
%A A062522 _Robert G. Wilson v_, Jun 24 2001