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 A059039 #3 Mar 30 2012 16:48:58 %S A059039 1,1,2,1,5,7,1,17,27,31,1,69,130,164,174,1,373,729,1020,1158,1194,1, %T A059039 2491,4961,7166,8798,9544,9729,1,20020,39995,58711,74202,85318,90300, %U A059039 91531,1,186814,373549,552245,709994,836961,926680,966720 %N A059039 Triangle in A059037 read by rows in natural order. %K A059039 nonn,tabl %O A059039 0,3 %A A059039 _N. J. A. Sloane_, Feb 13 2001