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 A205005 #8 Mar 30 2012 18:58:10 %S A205005 1,1,3,6,1,3,3,28,1,1,10,3,15,1,6,120,28,3,36,1,15,6,55,21,3,10,1,10, %T A205005 91,6,105,496,3,21,1,6,153,28,6,15,190,3,210,1,10,45,253,105,6,28,15, %U A205005 3,325,1,36,10,21,78,406,6 %N A205005 The triangular number T(j) such that n divides T(k)-T(j)>0, where k is the least positive integer for which such a j exists. %C A205005 For a guide to related sequences, see A204892. %t A205005 (See the program at A205002.) %Y A205005 Cf. A204892, A205002. %K A205005 nonn %O A205005 1,3 %A A205005 _Clark Kimberling_, Jan 21 2012