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 A063180 #3 Mar 02 2015 16:08:46 %S A063180 1,0,1,0,1,2,0,2,3,4,0,4,7,10,12,0,12,22,31,38,42,0,42,80,115,144,166, %T A063180 178,0,178,344,500,637,748,828,870,0,870,1698,2488,3205,3820,4308, %U A063180 4652,4830,0,4830,9482,13968,18132 %N A063180 The array of A063179 read by diagonals in direction of creation. %Y A063180 Cf. A063179, A063181. %K A063180 easy,nonn,tabl %O A063180 1,6 %A A063180 _Floor van Lamoen_, Jul 09 2001