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 A028264 #8 Jul 02 2025 16:01:55 %S A028264 1,1,1,1,3,1,1,1,1,5,5,1,1,13,13,1,1,7,19,19,7,1,1,45,45,1,1,9,71,71, %T A028264 9,1,1,43,105,161,161,105,43,1,1,11,53,53,11,1,1,201,201,1,1,13,265, %U A028264 615,615,265,13,1,1,89,341,1617,1617,341,89,1,1,15,103,1221,2497,3795,3795 %N A028264 Odd elements in 3-Pascal triangle A028262 (by row). %K A028264 nonn,tabf,easy %O A028264 0,5 %A A028264 _Mohammad K. Azarian_ %E A028264 More terms from _James Sellers_