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 A205393 #5 Mar 30 2012 18:58:11 %S A205393 1,2,3,2,10,5,4,9,24,14,8,7,13,27,23,12,11,31,26,18,40,65,17,16,43,90, %T A205393 24,33,53,23,22,42,32,152,57,31,41,189,30,29,103,40,51,75,39,275,62, %U A205393 38,37,96,185,102,49,61,111,48,87,434,47,46,229,495,101,59,144 %N A205393 Least h such that n divides the h-th difference between distinct numbers ceiling(j^2/2); the differences are ordered as in A205392. %C A205393 For a guide to related sequences, see A204892. %t A205393 (See the program at A205394.) %Y A205393 Cf. A205394, A204892. %K A205393 nonn %O A205393 1,2 %A A205393 _Clark Kimberling_, Jan 27 2012