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 A332663 #5 Feb 19 2020 07:22:22 %S A332663 0,0,1,2,0,1,2,3,4,5,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,10,11,12, %T A332663 13,14,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,0,1,2,3,4, %U A332663 5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21 %N A332663 Even bisection of A332662: the x-coordinates of an enumeration of N X N. %p A332663 # See A332662. %Y A332663 Cf. A332662, A002260, A014370, A000292 (positions of 0). %K A332663 nonn %O A332663 0,4 %A A332663 _Peter Luschny_, Feb 19 2020