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 A248335 #24 Nov 14 2014 13:14:19 %S A248335 1,23,3445,45565667,5667677867787889,6778788978898990788989908990901, %T A248335 7889899089909018990901901112899090190111290111211223, %U A248335 89909019011129011121122390111211223112232323349011121122311223232334112232323342323343445 %N A248335 A recursive sequence generated by an L-system defined in comments. %C A248335 The L-system producing the sequence is defined as follows: %C A248335 Alphabet: 1 2 3 4 5 6 7 8 9 0 %C A248335 Initiator: 1 %C A248335 Production rules: (1 --> 23), (2 --> 34), (3 --> 45), (4 --> 56), (5 --> 67), (6 --> 78), (7 --> 89), (8 --> 90), (9 --> 1), (0 --> 12). %H A248335 Felix Fröhlich, <a href="/A248335/a248335.txt">C++ program for this sequence</a> %H A248335 Wikipedia, <a href="http://en.wikipedia.org/wiki/L-system">L-system</a> %Y A248335 Cf. A057985, A073058, A103684. %K A248335 nonn,base %O A248335 1,2 %A A248335 _Felix Fröhlich_, Oct 26 2014