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 A046575 #9 Jul 02 2025 16:01:57 %S A046575 1,1,1,1,5,4,1,1,9,4,1,1,19,4,13,4,1,1,8,1,17,4,1,1,35,2,49,4,21,4,1, %T A046575 1,119,4,35,2,25,4,1,1,259,4,189,4,95,4,29,4,1,1,112,1,71,1,31,1,33,4, %U A046575 1,1,483,2,183,1,102,1,157,4,37,4,1,1,849,2,285,1,565,4,97,2,41,4,1,1 %N A046575 First numerator and then denominator of the elements to the right of the central elements of the 1/4-Pascal triangle. %e A046575 1/1; 1/1 1/1; 1/1 1/4 1/1; 1/1 5/4 5/4 1/1; 1/1 9/4 5/2 9/4 1/1; 1/1 13/4 19/4 19/4 13/4 1/1; 1/1 17/4 8/1 19/2 8/1 17/4 1/1; 1/1 21/4 49/4 35/2 35/2 49/4 21/4 1/1; ... %Y A046575 Cf. A046563. %K A046575 nonn %O A046575 1,5 %A A046575 _Mohammad K. Azarian_ %E A046575 More terms from _James Sellers_, Dec 14 1999