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 A293837 #11 Dec 04 2017 09:33:13 %S A293837 1,2,2,3,1,0,0,1,2,3,4,4,3,2,1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, %T A293837 16,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,1,2,3,4,5,6,7,8,9,10,11, %U A293837 12,13,14 %N A293837 a(n) = A293836(n)/n. %Y A293837 Cf. A293836. %K A293837 nonn %O A293837 1,2 %A A293837 _Enrique Navarrete_, Oct 16 2017