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 A046579 #9 Jul 02 2025 16:01:57 %S A046579 1,1,1,1,5,1,1,9,1,1,19,13,1,1,8,1,17,1,1,35,2,49,21,1,1,119,35,2,25, %T A046579 1,1,259,189,95,29,1,1,112,1,71,1,31,1,33,1,1,483,2,183,1,102,1,157, %U A046579 37,1,1,849,2,285,1,565,97,2,41,1,1,1815,2,1419,2,1705,759,235,45,1,1,1617 %N A046579 First numerator and then denominator of the elements to the right of the central elements of the 1/4-Pascal triangle (by row), excluding 4's. %e A046579 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 A046579 Cf. A046563. %K A046579 nonn %O A046579 1,5 %A A046579 _Mohammad K. Azarian_ %E A046579 More terms from _James Sellers_, Dec 14 1999