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 A046596 #9 Jul 02 2025 16:01:57 %S A046596 1,1,1,1,4,1,1,4,4,1,1,4,4,1,1,4,4,4,4,1,1,4,1,1,4,1,1,4,4,4,4,1,1,4, %T A046596 4,1,4,4,1,1,4,4,4,4,4,4,4,4,1,1,4,1,1,1,1,1,1,4,1,1,4,4,1,1,1,1,4,4, %U A046596 1,1,4,4,1,1,1,4,4,1,1,4,4,4,4,4,4,4,4,1,1,4,1,1,4,1,1,1,4,1,1,4,1,1,4,4,4 %N A046596 Denominators of the 1/4-Pascal triangle (by row), excluding 2's. %e A046596 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 A046596 Cf. A046563. %K A046596 tabf,nonn %O A046596 1,5 %A A046596 _Mohammad K. Azarian_ %E A046596 More terms from _James Sellers_, Dec 14 1999