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 A130010 #3 Mar 30 2012 16:50:41 %S A130010 0,1,2,3,4,5,6,7,8,9,14,19,28,47,61,75,197,742,1104,1537,2208,2580, %T A130010 3684,4788,7385,7647,7909,31331,34285,34348,55604,62662,86935,93993, %U A130010 120284,129106,147640,156146,174680,183186,298320,355419,694280,925993,1084051,7913837,11436171,33445755,44121607 %N A130010 Keith numbers together with the numbers from 0 through 9. %C A130010 An alternative definition of Keith numbers would allow single-digit numbers, corresponding to degenerate recurrences of the form b(i) = b(i-1). %Y A130010 See A007629 for further information. %K A130010 nonn,base %O A130010 1,3 %A A130010 _N. J. A. Sloane_, Nov 05 2007