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 A046219 #14 Apr 07 2021 19:55:43 %S A046219 1,1,1,1,2,1,1,2,2,1,1,2,1,2,1,1,2,2,2,2,1,1,2,1,1,1,2,1,1,2,2,1,1,2, %T A046219 2,1,1,2,1,2,1,2,1,2,1,1,2,2,2,2,2,2,2,2,1,1,2,1,1,1,1,1,1,1,2,1,1,2, %U A046219 2,1,1,1,1,1,1,2,2,1,1,2,1,2,1,1,1,1,1 %N A046219 Denominators of elements of 1/2-Pascal triangle (by row). %e A046219 1/1; --> 1 %e A046219 1/1 1/1; --> 1 1 %e A046219 1/1 1/2 1/1; --> 1 2 1 %e A046219 1/1 3/2 3/2 1/1; --> ... %e A046219 1/1 5/2 3/1 5/2 1/1; %e A046219 1/1 7/2 11/2 11/2 7/2 1/1; %e A046219 1/1 9/2 9/1 11/1 9/1 9/2 1/1; %e A046219 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; %e A046219 ... %Y A046219 Cf. A046213. %K A046219 tabl,nonn,frac %O A046219 1,5 %A A046219 _Mohammad K. Azarian_ %E A046219 More terms from _Sean A. Irvine_, Apr 07 2021