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 A029665 #8 Jul 02 2025 16:01:56 %S A029665 2,2,2,2,2,16,2,2,36,2,2,64,140,196,2,204,336,2,100,540,714,2,1254,2, %T A029665 144,506,1210,2640,2,650,1716,2,196,2366,8008,2,2,256,1240,4200,10556, %U A029665 20384,30888,37180,2,1496,5440,14756,30940,51272,68068,2,324,6936 %N A029665 Even numbers to the left of the central elements of the (2,1)-Pascal triangle A029653. %K A029665 nonn,tabf %O A029665 0,1 %A A029665 _Mohammad K. Azarian_ %E A029665 More terms from _James Sellers_