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 A113703 #2 Mar 30 2012 17:27:47 %S A113703 10,19,18,27,26,39,38,56,111,74,147,146,219,218,435,290,579,578,867, %T A113703 866,1299,1298,1947,1121,589,341,186,371,265,105,69,45,44,55,54,80, %U A113703 159,53,52,103,102,152,208,415,414,459,458,915,365,145,115,114,132,176,351,350 %N A113703 Retrograde trajectory of 10 under map k -> A111273(k). %C A113703 Also trajectory of 10 under map k -> A113658(k). %C A113703 Conjecture: Sequence is not periodic. %C A113703 For the trajectory of 10 under map k -> A111273(k) see A113702. %Y A113703 Cf. A111273, A113658, A113659, A113700, A113701, A113702. %K A113703 nonn %O A113703 0,1 %A A113703 _Klaus Brockhaus_, Nov 08 2005