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 A052152 #5 May 10 2013 12:44:15 %S A052152 8,8256,1431787520,48038430520647680,330117345346734148058349568, %T A052152 483957144078539402095793819136691273728, %U A052152 155682086691161145712706205845400916732707415735140352 %N A052152 Number of self-complementary directed 3-multigraphs with loops on 2n nodes. %Y A052152 Cf. A001374, A047832. %K A052152 nonn %O A052152 1,1 %A A052152 _Vladeta Jovovic_, Jan 24 2000