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 A028274 #9 Jul 02 2025 16:01:55 %S A028274 5,13,19,7,45,71,9,161,105,43,53,11,201,615,265,13,1617,341,89,3795, %T A028274 2497,1221,103,15,8151,1651,533,14443,5369,651,17,30745,24453,15379, %U A028274 7553,2835,785,151,169,19,1105,5661,1293,21,24225,1501,229,90117,31179 %N A028274 Odd elements (greater than 1) to right of central elements in 3-Pascal triangle A028262. %K A028274 nonn,easy %O A028274 1,1 %A A028274 _Mohammad K. Azarian_ %E A028274 More terms from _James Sellers_