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 A120239 #2 Mar 30 2012 18:57:06 %S A120239 1,3,4,2,8,9,11,12,5,6,17,7,21,22,24,25,10,29,30,32,33,13,14,38,15,16, %T A120239 43,45,46,18,19,51,20,55,56,58,59,23,63,64,66,67,26,27,72,28,76,77,79, %U A120239 80,31,84,85,87,88,34,35,93,36,37,98,100,101,39,40,106,41,42,111,113 %N A120239 Split-floor-multiplier sequence (SFMS) using multipliers 1/tau and tau, where tau=(1+sqrt(5))/2. (SFMS is defined at A120229.). %C A120239 A permutation of the natural numbers. %F A120239 a(n)=[nr] if this is positive and new, else a(n)=[n/r], where r=2/(1+sqrt(5)). %Y A120239 Cf. A120229, A120240. %K A120239 nonn %O A120239 1,2 %A A120239 _Clark Kimberling_, Jun 11 2006