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 A267218 #44 Feb 13 2016 04:13:14 %S A267218 1,2,2,4,16,22016 %N A267218 a(n) is the a(n-1)-st a(n-2)-dimensional orthoplex number, starting with the terms 1, 2. %H A267218 OEIS Wiki, <a href="http://oeis.org/wiki/Orthoplex_numbers">Orthoplex numbers</a> %e A267218 16 is the 4th 2-orthoplex number = A000290(4). %e A267218 22016 is the 16th 4-orthoplex number = A014820(16). %e A267218 The next term will be the 22016th 16-orthoplex number. %Y A267218 Cf. A000290, A014820, A260161, A051285. %K A267218 nonn %O A267218 1,2 %A A267218 _Robin Powell_, Jan 18 2016