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 A247573 #7 Sep 20 2014 14:12:01 %S A247573 3,4,5,20,7,42,17,19,41,11,13,26,85,61,29,272,31,114,81 %N A247573 Base-12 state complexity of partitioned deterministic finite automaton (PDFA) for the periodic sequence (123...n)*. %H A247573 Klaus Sutner and Sam Tetruashvili, <a href="http://www.cs.cmu.edu/~sutner/papers/auto-seq.pdf">Inferring automatic sequences</a> (see table on the p. 5). %Y A247573 Cf. similar sequences listed in A247566. %K A247573 nonn,more %O A247573 2,1 %A A247573 _Vincenzo Librandi_, Sep 20 2014