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 A046621 #9 Jul 02 2025 16:01:57 %S A046621 1,1,1,1,6,1,1,11,1,1,23,16,1,1,39,21,1,1,1,17,1,12,26,1,1,1,29,86,31, %T A046621 1,1,1,63,231,117,36,1,1,546,348,153,41,1,1,1176,894,501,194,46,1,1,1, %U A046621 414,1,279,1,139,1,48,51,1,1,4422,1,693,1,418,1,187,291,56,1,1,7887,1 %N A046621 First denominator and then numerator of each element to the right of the central elements of the 1/5-Pascal triangle (by row), excluding 5's. %e A046621 1/1; 1/1 1/1; 1/1 1/5 1/1; 1/1 6/5 6/5 1/1; 1/1 11/5 12/5 11/5 1/1; 1/1 16/5 23/5 23/5 16/5 1/1; 1/1 21/5 39/5 46/5 39/5 21/5 1/1; 1/1 26/5 12/1 17/1 17/1 12/1 26/5 1/1; ... %Y A046621 Cf. A046601. %K A046621 tabf,nonn %O A046621 1,5 %A A046621 _Mohammad K. Azarian_ %E A046621 More terms from _James Sellers_, Dec 16 1999