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 A163144 #3 May 01 2013 21:10:56 %S A163144 1,3,9,36,192,1565,19295,878272,1844953969,52993098927711 %N A163144 Partial sums of A058133. %C A163144 3 and 1844953969 are prime. %Y A163144 Cf. A058129, A058133, A118601. %K A163144 nonn %O A163144 1,2 %A A163144 _Jonathan Vos Post_, Jul 21 2009 %E A163144 Edited (but not checked) by _N. J. A. Sloane_, Jul 25 2009