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 A100446 #7 Mar 30 2012 17:36:53 %S A100446 1,3,6,14,36,108,352,1182,4116,14602,52488,190746,699252,2581428, %T A100446 9587580,35792568,134219796,505294128,1908881900,7233642930, %U A100446 27487816992,104715443852,399822505524,1529755490574,5864062367252,22517998808028 %N A100446 Bisection of A000031. %Y A100446 Cf. A000031, A100447. %K A100446 nonn,easy %O A100446 0,2 %A A100446 _N. J. A. Sloane_, Nov 21 2004 %E A100446 More terms from _Joshua Zucker_, May 12 2006