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 A181116 #2 Mar 30 2012 18:53:10 %S A181116 1,1,1,1,0,1,3,1,0,1,1,0,0,0,1,1,1,1,0,0,1,1,0,0,0,0,0,1,5,3,0,1,0,0, %T A181116 0,1,3,0,1,0,0,0,0,0,1,1,1,0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,1,3,1, %U A181116 3,1,0,1,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,1,0,0,0,0,0,0,1 %N A181116 Triangle T(n,k) read by rows. T(n,k) = A046643(A126988). %C A181116 Numerator in fraction A181116/A181117. A051731=(A181116/A181117)*(A181116/A181117). %e A181116 Triangle starts: %e A181116 1, %e A181116 1,1, %e A181116 1,0,1, %e A181116 3,1,0,1, %e A181116 1,0,0,0,1, %e A181116 1,1,1,0,0,1, %e A181116 1,0,0,0,0,0,1, %e A181116 5,3,0,1,0,0,0,1, %e A181116 3,0,1,0,0,0,0,0,1, %e A181116 1,1,0,0,1,0,0,0,0,1, %e A181116 1,0,0,0,0,0,0,0,0,0,1, %e A181116 3,1,3,1,0,1,0,0,0,0,0,1, %e A181116 1,0,0,0,0,0,0,0,0,0,0,0,1, %e A181116 1,1,0,0,0,0,1,0,0,0,0,0,0,1, %e A181116 1,0,1,0,1,0,0,0,0,0,0,0,0,0,1, %Y A181116 Cf. A181117, A046643, A051731. %K A181116 nonn,tabl %O A181116 1,7 %A A181116 _Mats Granvik_, Oct 04 2010