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 A205030 #8 Mar 30 2012 18:58:10 %S A205030 2,2,6,2,2,6,6,12,2,2,20,6,30,6,12,56,56,2,72,2,30,20,110,6,6,30,2,2, %T A205030 182,12,210,240,6,56,2,6,306,72,12,2,380,30,420,12,20,110,506,42,12,6, %U A205030 30,20,650,2,72,20,42,182,812,12 %N A205030 The number s(j)=j*(j+1) such that n divides s(k)-s(j)>0, where k is the least positive integer for which such a j exists. %C A205030 For a guide to related sequences, see A204892. %t A205030 (See the program at A205018.) %Y A205030 Cf. A205018, A204892. %K A205030 nonn %O A205030 1,1 %A A205030 _Clark Kimberling_, Jan 22 2012