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 A046569 #12 Jul 02 2025 16:01:57 %S A046569 1,1,1,1,4,1,1,4,4,1,1,4,2,4,1,1,4,4,4,4,1,1,4,1,2,1,4,1,1,4,4,2,2,4, %T A046569 4,1,1,4,2,4,1,4,2,4,1,1,4,4,4,4,4,4,4,4,1,1,4,1,1,1,2,1,1,1,4,1,1,4, %U A046569 4,1,1,2,2,1,1,4,4,1,1,4,2,4,1,2,1,2,1,4,2,4,1,1,4,4,4,4,2,2,2,2,4,4,4,4,1 %N A046569 Denominators of the 1/4-Pascal triangle (by row). %e A046569 1/1; --> 1 %e A046569 1/1 1/1; --> 1 1 %e A046569 1/1 1/4 1/1; --> 1 4 1 %e A046569 1/1 5/4 5/4 1/1; --> 1 4 4 1 %e A046569 1/1 9/4 5/2 9/4 1/1; --> ... %e A046569 1/1 13/4 19/4 19/4 13/4 1/1; %e A046569 1/1 17/4 8/1 19/2 8/1 17/4 1/1; %e A046569 1/1 21/4 49/4 35/2 35/2 49/4 21/4 1/1; ... %Y A046569 Cf. A046563. %K A046569 tabl,nonn,frac %O A046569 1,5 %A A046569 _Mohammad K. Azarian_ %E A046569 More terms from _James Sellers_, Dec 14 1999