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 A204986 #6 Feb 27 2013 09:44:10 %S A204986 1,1,2,3,7,2,4,6,16,7,46,5,67,4,7,10,29,16,154,12,16,46,56,9,191,67, %T A204986 154,8,379,7,11,15,46,29,67,23,631,154,67,18,191,16,92,57,67,56,254, %U A204986 14,211,191 %N A204986 Least k such that n divides A204985(k), the k-th difference between numbers of the form 2^k. %C A204986 A204986(2n-1)=A204939(2n-1) for n>=1. For a guide to related sequences, see A204892. %t A204986 (See the program at A204987.) %Y A204986 Cf. A204987, A204892. %K A204986 nonn %O A204986 1,3 %A A204986 _Clark Kimberling_, Jan 21 2012