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 A320903 #4 Oct 25 2018 17:22:49 %S A320903 1,2,4,10,29,93,314,1086,3797,13346,47063,166416,590090,2098694, %T A320903 7488519,26813197,96354259,347536624,1258206722,4572144768, %U A320903 16675669693,61039087954,224207709627,826341998343,3055482044305,11333152257127,42161040222916,157289354573120 %N A320903 Row sums of A320902. %Y A320903 Cf. A320902. %K A320903 nonn %O A320903 0,2 %A A320903 _Peter Luschny_, Oct 23 2018