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 A162776 #2 Mar 30 2012 17:34:01 %S A162776 0,0,2,2,6,6,10,14,22,26 %N A162776 a(n) = A161828(n)*2/3. %Y A162776 Cf. A160120, A161828, A161829, A161834. %K A162776 more,nonn %O A162776 0,3 %A A162776 _Omar E. Pol_, Jul 17 2009