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 A112585 #3 Mar 31 2012 10:30:58 %S A112585 1,8,10,12,171,69,461,26,12203,104,318880,728,57725,5804,6698,9722 %N A112585 Lengths of the loop of the sequences "Sum of last n digits" beginning with (n-1) zeros followed by digit 6. %e A112585 a(4)=12 because the sum of last four *digits* of the sequence beginning with 0,0,0,6, (three zeros followed by a 6) enters in a loop whose length is 12 terms; so a(4)=12 %e A112585 a(5)=171 because "Sum of last five digits" beginning with 0,0,0,0,6 enters in a cycle of 171 terms. %e A112585 Computed by Michael D Beeler. %Y A112585 Cf. A112395. %K A112585 base,easy,nonn %O A112585 1,2 %A A112585 _Alexandre Wajnberg_, Dec 17 2005