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 A207800 #15 May 01 2016 02:44:31 %S A207800 1,2,3,4,7,8,5,16,15,32,6,64,11,128,9,256,31,512,10,1024,13,2048,12, %T A207800 4096,23,8192,17,16384,14,32768,18,65536,63,131072,20,262144,19, %U A207800 524288,24,1048576,27,2097152,33,4194304,21,8388608,34,16777216,47,33554432,36,67108864,22,134217728,40 %N A207800 Permutation of positive numbers. See comments. %C A207800 a(1)=1; on places 2,4,6,8,... we put 2^m, m=1,2,3,..., i.e., numbers n with A000120(n)=1; on places 3,7,11,15,... we put numbers n with A000120(n)=2; on places 5,13,21,29,... we put numbers n with A000120(n)=3; etc. %C A207800 For general description of the order, see comment in A207790. %F A207800 a(n) = A066884(A209268(A065190(n))). Equivalently, a(n) = A067576(A249725(A065190(n))). - _Ivan Neretin_, Apr 30 2016 %Y A207800 Cf. A207790. %K A207800 nonn %O A207800 1,2 %A A207800 _Vladimir Shevelev_ and _Peter J. C. Moses_, Feb 20 2012 %E A207800 a(30) corrected by _Ivan Neretin_, Apr 30 2016