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 A166139 #4 Mar 30 2012 18:53:09 %S A166139 1,2,1,3,0,1,1,2,0,1,5,0,0,0,1,1,3,2,0,0,1,7,0,0,0,0,0,1,1,1,0,2,0,0, %T A166139 0,1,1,0,3,0,0,0,0,0,1,1,5,0,0,2,0,0,0,0,1,11,0,0,0,0,0,0,0,0,0,1,1,1, %U A166139 1,3,0,2,0,0,0,0,0,1,13,0,0,0,0,0,0,0,0,0,0,0,1 %N A166139 Triangle T(n,k) read by rows. A080305(A126988(n,k)) if k|n, 0 otherwise. %e A166139 Table begins: %e A166139 1 %e A166139 2,1 %e A166139 3,0,1 %e A166139 1,2,0,1 %e A166139 5,0,0,0,1 %e A166139 1,3,2,0,0,1 %e A166139 7,0,0,0,0,0,1 %e A166139 1,1,0,2,0,0,0,1 %e A166139 1,0,3,0,0,0,0,0,1 %e A166139 1,5,0,0,2,0,0,0,0,1 %e A166139 11,0,0,0,0,0,0,0,0,0,1 %e A166139 1,1,1,3,0,2,0,0,0,0,0,1 %e A166139 13,0,0,0,0,0,0,0,0,0,0,0,1 %Y A166139 Cf. A080305, row products A166140. %K A166139 nonn,tabl %O A166139 1,2 %A A166139 _Mats Granvik_, Oct 08 2009