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 A081778 #6 Mar 30 2012 18:39:16 %S A081778 6,2,19,4,33,9,46,7,60,16,72,12,85,23,99,16,79,29,126,22,139,35,153, %T A081778 23,166,43,180,30,192,49,205,31,219,56,232,40,246,62,259,39,273,69, %U A081778 286,48,300,76,303,48,229,83,223,58,352,89,366,55,367,95,380,67,406,102,296,63 %N A081778 Maximum element is the continued fraction for n*sum(k>=0,1/2^(2^k)). %F A081778 a(n)=n for n=2, 4, 12, 16, 48, 80, 108, 112, 123, 144..... %Y A081778 Cf. A007400. %K A081778 nonn %O A081778 1,1 %A A081778 _Benoit Cloitre_, Apr 10 2003