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 A046227 #15 Apr 08 2021 07:28:31 %S A046227 3,2,5,2,11,2,7,2,9,9,2,20,27,2,11,2,67,2,19,13,2,147,2,105,2,51,2,15, %T A046227 2,126,78,33,17,2,273,204,111,83,2,19,2,477,315,305,2,51,21,2,1023, %U A046227 792,935,2,407,2,123,2,23,2,1815,2519,2,671,265,73,25,2,3861 %N A046227 First numerator and then denominator of elements to right of central elements of 1/2-Pascal triangle (by row), excluding 1's. %e A046227 1/1; --> %e A046227 1/1 1/1; --> %e A046227 1/1 1/2 1/1; --> %e A046227 1/1 3/2 3/2 1/1; --> 3 2 %e A046227 1/1 5/2 3/1 5/2 1/1; --> 5 2 %e A046227 1/1 7/2 11/2 11/2 7/2 1/1; --> ... %e A046227 1/1 9/2 9/1 11/1 9/1 9/2 1/1; %e A046227 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; %e A046227 ... %Y A046227 Cf. A046213. %K A046227 tabf,nonn,frac,less %O A046227 1,1 %A A046227 _Mohammad K. Azarian_ %E A046227 More terms from _Sean A. Irvine_, Apr 07 2021