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 A046566 #22 Apr 14 2021 03:47:31 %S A046566 4,4,5,4,5,4,9,2,5,4,9,4,13,4,19,4,19,4,13,4,17,8,2,19,8,4,17,4,21,4, %T A046566 49,2,35,2,35,4,49,4,21,4,25,2,35,4,119,35,4,119,2,35,4,25,4,29,4,95, %U A046566 4,189,4,259,4,259,4,189,4,95,4,29,4,33,31,71,112,2 %N A046566 First denominator and then numerator of the 1/4-Pascal triangle (by row), excluding 1's. %e A046566 1/1; --> %e A046566 1/1 1/1; --> %e A046566 1/1 1/4 1/1; --> 4 %e A046566 1/1 5/4 5/4 1/1; --> 4 5 4 5 %e A046566 1/1 9/4 5/2 9/4 1/1; --> 4 9 2 5 4 9 %e A046566 1/1 13/4 19/4 19/4 13/4 1/1; --> ... %e A046566 1/1 17/4 8/1 19/2 8/1 17/4 1/1; %e A046566 1/1 21/4 49/4 35/2 35/2 49/4 21/4 1/1; ... %Y A046566 Cf. A046563. %K A046566 tabf,nonn,less %O A046566 1,1 %A A046566 _Mohammad K. Azarian_ %E A046566 More terms from _Sean A. Irvine_, Apr 13 2021