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 A117149 #2 Mar 30 2012 17:27:48 %S A117149 4,6,10,17,12,20,34,58,99,70,119,84,143,101,72,122,208,355,251,178, %T A117149 303,214,365,258,440,751,531,376,641,453,321,227,161,114,194,331,234, %U A117149 399,282,481,340,580,990,1690,2885,2040,3482,5944,10147,7175,5074,8661,6124 %N A117149 Trajectory of 4 under map k -> A094077(k). %C A117149 Permutation A094077 has fixed point 1, 2-cycle (2,3) and 5-cycle (14,23,16,27,19); there are no other finite cycles with terms < 500000. 4 is the smallest number that is not member of a known finite cycle of A094077. %C A117149 Conjecture: Sequence is not periodic. %C A117149 For the retrograde trajectory of 4 see A117150. %Y A117149 Cf. A094077, A115966, A117150. %K A117149 nonn %O A117149 0,1 %A A117149 _Klaus Brockhaus_, Feb 28 2006