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 A059574 #4 Mar 02 2015 16:08:45 %S A059574 1,1,2,6,4,1,1,13,19,23,116,107,87,48,1,1,243,458,635,708,736,5659, %T A059574 5533,5163,4239,2967,1517,1,1,11562,22824,33291,41772,47733,50031, %U A059574 50796,521040,515254,497789,452016,385422,301161,204598,103125,1 %N A059574 The array described in A059513 read by antidiagonals in the 'up' direction. %Y A059574 Cf. A000667, A035002, A059216, A059219, A059575. %K A059574 easy,nonn,tabl %O A059574 1,3 %A A059574 _Floor van Lamoen_, Jan 23 2001