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 A028273 #8 Jul 02 2025 16:01:55 %S A028273 4,6,26,8,34,10,266,148,588,414,64,12,1002,76,2178,880,14,430,6292, %T A028273 3718,118,16,10010,2184,134,18,55198,39832,22932,10388,3620,936, %U A028273 116688,95030,62764,33320,14008,4556,188,20,211718,157794,96084,47328,18564 %N A028273 Even elements to right of central elements in 3-Pascal triangle A028262. %K A028273 nonn,easy %O A028273 0,1 %A A028273 _Mohammad K. Azarian_ %E A028273 More terms from _James Sellers_