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 A016059 #4 Mar 30 2012 17:30:18 %S A016059 2,6,18,42,69,126,207,378,621,906,1311,1863,2718,3825,4509,5589,8154, %T A016059 11475,13527,16767,20130,24909,30894,36078,40581,50301,60390,72675, %U A016059 85671,92682,107910,118503,121743,150903 %N A016059 (s(n)+s(n+1))/6, where s()=A006521. %K A016059 nonn %O A016059 2,1 %A A016059 _Robert G. Wilson v_