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 A125789 #3 Mar 30 2012 18:37:02 %S A125789 1,2,4,9,23,68,234,935,4313,22794,136851,925272,6985389,58417589, %T A125789 537217862,5396822876,58872576894,693533824034,8773792493050, %U A125789 118464612577309,1694805159152944,25478007021649650,398912310757588476 %N A125789 Antidiagonal sums of table A125781. %Y A125789 Cf. A125781. %K A125789 nonn %O A125789 0,2 %A A125789 _Paul D. Hanna_, Dec 09 2006