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 A047105 #4 Mar 30 2012 18:56:53 %S A047105 1,3,5,31,120,491,2016,8039,31884,126281,498558,1965077,7740246, %T A047105 30473582,119948507,472129697,1858535320,7317392228,28816569762, %U A047105 113512547183,447270667394,1762899256258,6950527615283,27412071431285 %N A047105 T(n,n-3), array T as in A047100. %K A047105 nonn %O A047105 3,2 %A A047105 _Clark Kimberling_