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 A205123 #8 Mar 30 2012 18:58:10 %S A205123 1,2,1,2,3,4,2,2,3,3,1,4,4,2,3,4,3,3,2,3,5,3,5,4,2,4,4,2,7,3,1,4,1,3, %T A205123 5,3,2,2,4,4,11,5,4,3,3,5,2,4,1,2,2,4,4,4,7,5,2,7,5,3,12,4,5,6,3,6,2, %U A205123 3,3,5 %N A205123 The index j<k such that n divides s(k)-s(j), where k is the least index (A205122) for which such j exists, and s(k)=k*(2^(k-1)). %C A205123 For a guide to related sequences, see A204892. %t A205123 (See the program at A205122.) %Y A205123 Cf. A205122, A204892. %K A205123 nonn %O A205123 1,2 %A A205123 _Clark Kimberling_, Jan 25 2012