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 A067061 #4 Dec 05 2013 19:55:07 %S A067061 4,1,5,2,6,3,10,7,11,8,12,9,16,13,17,14,18,15,22,19,23,20,24,21,28,25, %T A067061 29,26,30,27,34,31,35,32,36,33,40,37,41,38,42,39,46,43,47,44,48,45,52, %U A067061 49,53,50,54,51,58,55,59,56,60,57,64,61,65,62,66,63,70,67,71,68,72,69 %N A067061 A permutation of the natural numbers. %C A067061 Start with the sequence of natural numbers. Rearrange the sequence so that any two consecutive numbers differ by at least 3, by the following process. %C A067061 Move 1 by the minimum number of steps required to the right. %C A067061 Move 2 by the minimum number of steps required to the right, etc. %C A067061 Move the first element which is required to be moved by the minimum number of steps in the sequence obtained by the previous step. %C A067061 Initial sequence 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,... %C A067061 after one step.. 2,3,4,1,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,... %C A067061 after two steps. 3,4,1,5,2,6,7,8,9,10,11,12,13,14,15,16,17,18,19,... %C A067061 after 3 steps... 4,1,5,2,6,3,8,9,10,7,11,12,13,14,15,16,17,18,19,... %C A067061 Start with 4. Decrease by 3 then increase by 4 then decrease by 3 and then increase by 4 Decrease by 3 then increase by 7 to obtain first seven terms. Repeat the process for getting the subsequent terms. %Y A067061 Cf. A067060. %K A067061 nonn %O A067061 1,1 %A A067061 _Amarnath Murthy_, Jan 03 2002 %E A067061 More terms from Larry Reeves (larryr(AT)acm.org), Apr 03 2002