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 A046597 #10 Jul 02 2025 16:01:57 %S A046597 1,1,1,1,1,1,1,1,2,1,1,1,1,1,2,1,1,1,2,2,1,1,2,1,2,1,1,1,1,1,1,1,2,1, %T A046597 1,1,1,1,1,1,2,2,1,1,1,1,2,1,2,1,2,1,2,1,1,2,2,2,2,1,1,1,2,1,1,1,1,1, %U A046597 2,1,1,1,2,2,1,1,2,2,1,1,2,1,2,1,2,1,2,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1 %N A046597 Denominators of the 1/4-Pascal triangle (by row), excluding 4's. %e A046597 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 A046597 Cf. A046563. %K A046597 tabf,nonn %O A046597 1,9 %A A046597 _Mohammad K. Azarian_ %E A046597 More terms from _James Sellers_, Dec 14 1999