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 A247579 #7 Sep 20 2014 14:10:52 %S A247579 3,4,9,20,7,21,25,10,41,110,25,52,43,61,65,17,19,38,99 %N A247579 Base-18 state complexity of partitioned deterministic finite automaton (PDFA) for the periodic sequence (123...n)*. %H A247579 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 A247579 Cf. similar sequences listed in A247566. %K A247579 nonn,more %O A247579 2,1 %A A247579 _Vincenzo Librandi_, Sep 20 2014