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 A028268 #8 Jul 02 2025 16:01:55 %S A028268 1,3,5,13,7,19,45,9,71,43,105,161,11,53,201,265,615,89,341,1617,15, %T A028268 103,1221,2497,3795,533,1651,8151,17,651,5369,14443,151,785,2835,7553, %U A028268 15379,24453,30745,169,1105,21,1293,5661,229,1501,24225,23,251,8455 %N A028268 Distinct odd elements in 3-Pascal triangle A028262 (by row). %K A028268 nonn,tabf %O A028268 0,2 %A A028268 _Mohammad K. Azarian_ %E A028268 More terms from _James Sellers_