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 A046225 #12 Apr 13 2021 21:13:13 %S A046225 1,1,1,1,3,2,1,1,5,2,1,1,11,2,7,2,1,1,9,1,9,2,1,1,20,1,27,2,11,2,1,1, %T A046225 67,2,19,1,13,2,1,1,147,2,105,2,51,2,15,2,1,1,126,1,78,1,33,1,17,2,1, %U A046225 1,273,1,204,1,111,1,83,2,19,2,1,1,477,1,315,1 %N A046225 First numerator and then denominator of elements to right of central elements of 1/2-Pascal triangle. %e A046225 1/1; --> %e A046225 1/1 1/1; --> 1 1 %e A046225 1/1 1/2 1/1; --> 1 1 %e A046225 1/1 3/2 3/2 1/1; --> 3 2 1 1 %e A046225 1/1 5/2 3/1 5/2 1/1; --> ... %e A046225 1/1 7/2 11/2 11/2 7/2 1/1; %e A046225 1/1 9/2 9/1 11/1 9/1 9/2 1/1; %e A046225 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ... %Y A046225 Cf. A046213. %K A046225 tabf,nonn,frac,less %O A046225 1,5 %A A046225 _Mohammad K. Azarian_ %E A046225 More terms from _Sean A. Irvine_, Apr 07 2021