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 A046939 #10 Jan 08 2013 04:54:51 %S A046939 2,8,14,20,50,82,126,184 %N A046939 "Magic numbers" for the number of neutrons in nucleus. %D A046939 McGraw-Hill Encyclopedia of Science and Technology %Y A046939 Cf. A046940, A018226. %K A046939 nonn %O A046939 1,1 %A A046939 _Jud McCranie_