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 A091743 #4 Oct 12 2012 14:40:20 %S A091743 1,131,12702,1331426,163594663,23979017805,4187448766444, %T A091743 864808560876788,209300424292684605,58811116750666789895, %U A091743 19017126570296402361706,7018937700334256743262646 %N A091743 Third column (m=2) of triangle A060063 divided by 9. %F A091743 a(n)= A060063(n, 2)/9, n>=2. %K A091743 nonn,easy %O A091743 2,2 %A A091743 _Wolfdieter Lang_, Feb 13 2004