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 A162523 #4 Mar 30 2012 17:34:00 %S A162523 3,6,4,11,16,22 %N A162523 First differences of magic numbers A018226, divided by 2. %C A162523 Sequence related to atomic nucleus. %F A162523 a(n) = A162522(n)/2. %Y A162523 Cf. A018226, A130517, A130556, A130598, A130602, A162521, A162522, A162524, A162525. %K A162523 fini,full,nonn %O A162523 1,1 %A A162523 _Omar E. Pol_, Jul 06 2009