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 A028286 #8 Jul 02 2025 16:01:55 %S A028286 6,16,8,86,40,10,196,126,50,322,176,12,714,498,1212,310,86,14,2640, %T A028286 396,100,2992,496,16,17446,12012,6370,2548,742,148,18,37180,29458, %U A028286 18382,8918,3290,890,166,66638,47840,27300,12208,4180,1056,20,140998,114478 %N A028286 Even elements to right of central elements in 4-Pascal triangle A028275. %K A028286 nonn,tabf %O A028286 0,1 %A A028286 _Mohammad K. Azarian_ %E A028286 More terms from _James Sellers_