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 A065249 #6 May 01 2014 02:49:07 %S A065249 2,8,1,32,4,11,6,128,16,35,18,5,47,24,3,512,64,131,66,17,143,72,9,21, %T A065249 44,23,191,96,12,27,14,2048,256,515,258,65,527,264,33,69,140,71,575, %U A065249 288,36,75,38,10,87,176,22,93,188,95,767,384,48,99,50,13,111,56,7,8192 %N A065249 Permutation of N induced by the order-preserving permutation of the positive rational numbers (x -> x/2), positions in Stern-Brocot tree. %H A065249 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/stebrota.htm">Conjecture regarding A065249 and A065251</a> %H A065249 <a href="/index/St#Stern">Index entries for sequences related to Stern's sequences</a> %H A065249 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %p A065249 [seq(A065249(j),j=1..120)]; A065249 := n -> frac2position_in_whole_SB_tree((SternBrocotTreeNum(n)/SternBrocotTreeDen(n))/2); %Y A065249 Cf. A057114, A065251. Inverse permutation: A065250. %K A065249 nonn %O A065249 1,1 %A A065249 _Antti Karttunen_, Oct 25 2001