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 A007804 #13 Oct 07 2013 01:26:32
%S A007804 1,30,1730,152340,18177750,2742927876,500848449300,107365679361000,
%T A007804 26431620161451750,7348772237141884500,2277376143931016207100,
%U A007804 778374526612873263759000,290867891728117751744917500
%N A007804 Related to the asymptotic expansion of Sum_{k = 0..n} C(n,k)^4.
%Y A007804 Cf. A005260.
%K A007804 nonn
%O A007804 0,2
%A A007804 _Bruno Haible_