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 A028265 #9 Jul 02 2025 16:01:55 %S A028265 3,5,5,13,13,7,19,19,7,45,45,9,71,71,9,43,105,161,161,105,43,11,53,53, %T A028265 11,201,201,13,265,615,615,265,13,89,341,1617,1617,341,89,15,103,1221, %U A028265 2497,3795,3795,2497,1221,103,15,533,1651,8151,8151,1651,533,17,651 %N A028265 Odd elements in 3-Pascal triangle A028262 (by row) that are not 1. %K A028265 nonn,easy %O A028265 1,1 %A A028265 _Mohammad K. Azarian_ %E A028265 More terms from _James Sellers_