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 A169697 #2 Mar 30 2012 16:51:44 %S A169697 1,5,3,19,3,15,9,65,3,15,9,57,9,45,27,211,3,15,9,57,9,45,27,195,9,45, %T A169697 27,171,27,135,81,665,3,15,9,57,9,45,27,195,9,45,27,171,27,135,81,633, %U A169697 9,45,27,171,27,135,81,585,27,135,81,513,81,405,243,2059,3,15,9,57,9,45,27,195 %N A169697 The rows of A169689 converge to 4 times this sequence. %F A169697 If n = 2^m*(2t+1) then a(n) = (3^(m+1)-2^(m+1))*3^wt(t) where wt() = A000120(). %Y A169697 Cf. A169689. Bisections: A048883, A169698. %K A169697 nonn %O A169697 1,2 %A A169697 _N. J. A. Sloane_, Apr 15 2010