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 A046623 #12 Jun 22 2013 16:05:41 %S A046623 1,1,1,1,1,1,1,1,5,1,1,1,1,1,5,5,1,1,1,1,5,11,5,5,11,1,1,1,1,5,5,23,5, %T A046623 23,5,1,1,1,1,5,21,5,39,5,5,39,5,21,1,1,1,1,5,1,1,17,1,17,1,5,1,1,1,1, %U A046623 5,31,5,1,29,1,1,29,5,5,31,1,1,1,1 %N A046623 Odd numbers in writing first denominator and then numerator of each element of the 1/5-Pascal triangle (by row). %e A046623 1/1; --> 1 1 %e A046623 1/1 1/1; --> 1 1 1 1 %e A046623 1/1 1/5 1/1; --> 1 1 5 1 1 1 %e A046623 1/1 6/5 6/5 1/1; --> 1 1 5 5 1 1 %e A046623 1/1 11/5 12/5 11/5 1/1; --> ... %e A046623 1/1 16/5 23/5 23/5 16/5 1/1; %e A046623 1/1 21/5 39/5 46/5 39/5 21/5 1/1; %e A046623 1/1 26/5 12/1 17/1 17/1 12/1 26/5 1/1; ... %Y A046623 Cf. A046601. %K A046623 tabf,frac,nonn,less %O A046623 1,9 %A A046623 _Mohammad K. Azarian_