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 A065670 #5 May 01 2014 02:49:15 %S A065670 1,2,115,4,5,234881023,7,8,9,10,11,877,112,475,15,16,17,18,19,20,21, %T A065670 22,23,52,445,57355,3616,235,1915,30,31,32,33,34,35,36,37,38,39,40,41, %U A065670 42,43,44,45,46,47,103,13,14191,28615,917506,229630,3613,454,934,120832 %N A065670 Permutation of N induced by rotating the node 6 right in the infinite planar binary tree shown at A065658. %H A065670 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A065670 This permutation touches only the rationals in the range ]1/2, 3/4[, which for example contains the sixth node = 3/5 of the SB ]0,1[ tree (A007305/A007306) which has an infinite, but periodic binary fractional expansion 0.100110011001... and by this permutation it is changed to 0.1010100110011001... = 53/80, which is located as the 234881023th node in the SB ]0,1[ tree. %p A065670 [seq(RotateBinFracNodeRight(6,j),j=1..256)]; %Y A065670 The sixth row of A065658. Inverse of A065671. %K A065670 nonn %O A065670 1,2 %A A065670 _Antti Karttunen_, Nov 22 2001