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 A046216 #13 Apr 07 2021 19:44:46 %S A046216 2,2,3,2,3,2,5,3,2,5,2,7,2,11,2,11,2,7,2,9,9,11,9,2,9,2,11,2,27,20,20, %T A046216 2,27,2,11,2,13,19,2,67,40,2,67,19,2,13,2,15,2,51,2,105,2,147,2,147,2, %U A046216 105,2,51,2,15,2,17,33,78,126,147,126,78,33,2,17,2 %N A046216 First denominator and then numerator of 1/2-Pascal triangle (by row), excluding 1's. %e A046216 1/1; --> %e A046216 1/1 1/1; --> %e A046216 1/1 1/2 1/1; --> 2 %e A046216 1/1 3/2 3/2 1/1; --> 2 3 2 3 %e A046216 1/1 5/2 3/1 5/2 1/1; --> ... %e A046216 1/1 7/2 11/2 11/2 7/2 1/1; %e A046216 1/1 9/2 9/1 11/1 9/1 9/2 1/1; %e A046216 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ... %Y A046216 Cf. A046213. %K A046216 tabf,nonn,frac,less %O A046216 1,1 %A A046216 _Mohammad K. Azarian_ %E A046216 More terms from _Sean A. Irvine_, Apr 07 2021