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 A101598 #7 Mar 30 2012 18:50:48 %S A101598 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,1,1,1,1,2,2,2,1,1,1,1,2,2,2,2, %T A101598 1,1,1,1,2,2,2,2,2,1,1,1,1,2,2,3,3,2,2,1,1,1,2,2,3,3,2,3,3,2,2,1,1,1, %U A101598 1,3,2,3,3,2,3,1,1,1,1,2,1,2,3,3,3,3,3,2,1,2,1,1,2,2,3,3,4,3,3,4,3,3,2,2,1 %N A101598 Triangle read by rows: T(n,k) = number of distinct digits in decimal representation of binomial(n,k), 0<=k<=n. %H A101598 <a href="/index/Pas#Pascal">Index entries for triangles and arrays related to Pascal's triangle</a> %F A101598 T(n, k) = A043537(A007318(n, k)). %Y A101598 Cf. A101599. %K A101598 nonn,tabl,base %O A101598 1,18 %A A101598 _Reinhard Zumkeller_, Dec 08 2004