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 A046221 #15 Apr 07 2021 20:01:12 %S A046221 1,1,1,1,1,1,1,3,3,1,1,5,3,5,1,1,7,11,11,7,1,1,9,9,11,9,9,1,1,11,27, %T A046221 27,11,1,1,13,19,67,67,19,13,1,1,15,51,105,147,147,105,51,15,1,1,17, %U A046221 33,147,33,17,1,1,19,83,111,273,273,111,83,19,1,1,21,51 %N A046221 Odd numbers on numerators of 1/2-Pascal triangle (by row). %e A046221 1/1; --> 1 %e A046221 1/1 1/1; --> 1 1 %e A046221 1/1 1/2 1/1; --> 1 1 1 %e A046221 1/1 3/2 3/2 1/1; --> 1 3 3 1 %e A046221 1/1 5/2 3/1 5/2 1/1; --> 1 5 3 5 1 %e A046221 1/1 7/2 11/2 11/2 7/2 1/1; --> 1 7 11 11 7 1 %e A046221 1/1 9/2 9/1 11/1 9/1 9/2 1/1; --> 1 9 9 11 9 9 1 %e A046221 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; --> 1 11 27 27 11 1 %e A046221 ... %Y A046221 Cf. A046213. %K A046221 tabf,nonn,frac,less %O A046221 1,8 %A A046221 _Mohammad K. Azarian_ %E A046221 More terms from _Sean A. Irvine_, Apr 07 2021