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 A205100 #9 Mar 30 2012 18:58:10 %S A205100 1,1,2,3,3,2,1,4,3,4,5,3,2,1,3,6,3,5,6,4,6,10,2,6,5,1,8,6,5,5,7,8,5,3, %T A205100 7,8,5,2,6,4,5,6,6,10,3,2,1,6,7,9,3,1,9,8,10,6,6,4,1,7 %N A205100 The index j<k such that n divides k!!-j!!, where k is the least index (A204982) for which such j exists. %C A205100 For a guide to related sequences, see A204892. %t A205100 (See the program at A204982.) %Y A205100 Cf. A204982, A204892. %K A205100 nonn %O A205100 1,3 %A A205100 _Clark Kimberling_, Jan 22 2012