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 A094957 #2 Apr 30 2014 01:30:10 %S A094957 1,2,4,10,30,101,370,1459,6161,27741,132621,670444,3571013,19975956, %T A094957 117026702,716199026,4568532550,30313253547,208834580360, %U A094957 1491280419431,11021454603693,84184429969735,663707628683503 %N A094957 Antidiagonal sums of array A094954. %K A094957 nonn %O A094957 1,2 %A A094957 _Ralf Stephan_, May 31 2004