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 A024617 #5 Mar 30 2012 18:55:58 %S A024617 1,2,4,6,9,12,16,20,25,31,37,43,50,58,65,73,82,92,102,111,122,132,144, %T A024617 155,167,181,194,207,222,237,252,267,283,297,314,333,349,367,385,404, %U A024617 422,444,466,483,505,524,546,568,591,615,637,662,684,706,733,759,784 %N A024617 Position of n^2 + n + 1 in A024614. %K A024617 nonn %O A024617 1,2 %A A024617 _Clark Kimberling_ %E A024617 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Mar 19 2008