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 A140486 #3 Mar 31 2012 14:43:40 %S A140486 2,6,11,14,18,23,26,30,37,40,46,50,54,59,62,66,71,74,78,83,86,90,97, %T A140486 100,106,110,114,119,122,126,131,134,138,143,146,150,157,160,166,170, %U A140486 174,179,182,186,191,194,198,203,206,210,218,222,227,230,234,239,242,246 %N A140486 Trajectory of 2 under repeated application of the map: n -> n + second-smallest number that does not divide n. %Y A140486 Cf. A140485-A140489. %K A140486 nonn %O A140486 1,1 %A A140486 _Eric Angelini_, Jun 25 2008 %E A140486 More terms from _Stefan Steinerberger_, Jul 01 2008