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 A245619 #17 Nov 19 2014 04:15:04 %S A245619 1,2,4,4,8,12,20,16,32,60,116,208,380,608,904,860,1720,3436,6868, %T A245619 13712,27356,54408,107848,211500,413364,785328,1469288,2591452, %U A245619 4583052,7074876,10413552,10096084,20192168,40384332,80768660,161537296,323074460,646148360 %N A245619 Row sums of triangle A245618. %H A245619 Peter J. C. Moses, <a href="/A245619/b245619.txt">Table of n, a(n) for n = 0..499</a> %Y A245619 Cf. A007318, A245618. %K A245619 nonn %O A245619 0,2 %A A245619 _Vladimir Shevelev_, Nov 05 2014 %E A245619 More terms from _Peter J. C. Moses_, Nov 05 2014