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 A046533 #10 Jun 22 2013 16:05:39 %S A046533 1,1,1,1,1,1,1,1,1,1,1,1,1,3,3,1,1,1,1,5,1,3,5,1,1,1,1,7,11,11,7,1,1, %T A046533 1,1,9,1,9,1,11,1,9,9,1,1,1,1,11,27,1,20,1,20,27,11,1,1,1,1,13,1,19, %U A046533 67,1,40,67,1,19,13,1,1,1,1,15,51 %N A046533 First denominator and then numerator of 1/2-Pascal triangle (by row), excluding 2's. %e A046533 1/1; %e A046533 1/1 1/1; %e A046533 1/1 1/2 1/1; %e A046533 1/1 3/2 3/2 1/1; %e A046533 1/1 5/2 3/1 5/2 1/1; %e A046533 1/1 7/2 11/2 11/2 7/2 1/1; %e A046533 1/1 9/2 9/1 11/1 9/1 9/2 1/1; %e A046533 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ... %e A046533 with numerator/denominator exchange and without the 2's. %Y A046533 Cf. A046213. %K A046533 tabf,nonn,less %O A046533 1,14 %A A046533 _Mohammad K. Azarian_