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 A046565 #19 Apr 14 2021 03:45:07 %S A046565 4,5,4,5,4,9,4,5,2,9,4,13,4,19,4,19,4,13,4,17,4,8,19,2,8,17,4,21,4,49, %T A046565 4,35,2,35,2,49,4,21,4,25,4,35,2,119,4,35,119,4,35,2,25,4,29,4,95,4, %U A046565 189,4,259,4,259,4,189,4,95,4,29,4,33,4,31,71,112 %N A046565 First numerator and then denominator of each element of the 1/4-Pascal triangle (by row), excluding 1's. %e A046565 1/1; --> %e A046565 1/1 1/1; --> %e A046565 1/1 1/4 1/1; --> 4 %e A046565 1/1 5/4 5/4 1/1; --> 5 4 5 4 %e A046565 1/1 9/4 5/2 9/4 1/1; --> ... %e A046565 1/1 13/4 19/4 19/4 13/4 1/1; %e A046565 1/1 17/4 8/1 19/2 8/1 17/4 1/1; %e A046565 1/1 21/4 49/4 35/2 35/2 49/4 21/4 1/1; ... %Y A046565 Cf. A046563. %K A046565 tabf,nonn,less %O A046565 1,1 %A A046565 _Mohammad K. Azarian_ %E A046565 More terms from _Sean A. Irvine_, Apr 13 2021