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 A059271 #3 Mar 30 2012 16:48:58 %S A059271 0,1,3,15,82,485,3039,19862,133969,925805,6521690,46658955,338115321, %T A059271 2476585674,18306446887,136384608971,1023041170426,7720127405881, %U A059271 58567844563843,446422706023630,3417223098702669,26257867836211825 %N A059271 Transform of A059226 applied to sequence 0, 1, 0, 0, 0, 0, ... %Y A059271 A059227 is transform of 1, 0, 0, 0, ... %K A059271 nonn,easy %O A059271 0,3 %A A059271 _N. J. A. Sloane_, Jan 24 2001