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 A016060 #6 Jan 27 2022 22:22:30 %S A016060 2,6,14,23,42,69,126,207,302,437,621,906,1275,1503,1863,2718,3825, %T A016060 4509,5589,6710,8303,10298,12026,13527,16767,20130,24225,28557,30894, %U A016060 35970,39501,40581,50301 %N A016060 (s(n)+s(n+1))/18, where s()=A006521. %Y A016060 Cf. A006521. %K A016060 nonn %O A016060 3,1 %A A016060 _Robert G. Wilson v_