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 A085475 #4 Mar 30 2012 18:58:53 %S A085475 0,1,0,1,1,0,1,5,1,0,1,10,9,1,0,1,15,31,13,1,0,1,21,69,64,17,1,0,1,28, %T A085475 126,195,109,21,1,0,1,36,210,456,425,166,25,1,0,1,45,330,923,1231,791, %U A085475 235,29,1,0,1,55,495,1716,2975,2751,1325,316,33,1,0,1,66,715,3003,6427 %N A085475 Square array of binomial related numbers, read by antidiagonals. %C A085475 Rows include A016813, A085473, A085474. %F A085475 T(n, k)=C(2n+k, k)-C(2n, k). %e A085475 Rows begin %e A085475 0 0 0 0 0 ... %e A085475 1 1 1 1 1 ... %e A085475 1 5 9 13 17 ... %e A085475 1 10 31 64 109 ... %e A085475 1 15 69 195 425 ... %K A085475 easy,nonn,tabl %O A085475 0,8 %A A085475 _Paul Barry_, Jul 01 2003