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 A087314 #10 Sep 24 2023 04:31:19
%S A087314 2,4,20,1154,3907502,609516468354242,108233912076063807870514781000,
%T A087314 205688069665244291374160325606433848956971528595913979304345602,
%U A087314 381367496233593231179533022742555015402552706280473714446093438118953849830784189071820024395733993533363857256493600698
%N A087314 a(n) = (1/n) * Sum_{k = 0..n} n^binomial(n,k).
%e A087314 a(3) = 1/3*{ 3^1 +3^3+3^3+3^1} = 20.
%o A087314 (PARI) a(n) = sum(k = 0, n, n^binomial(n, k))/n; \\ _David Wasserman_, May 02 2005
%Y A087314 Cf. A001315.
%K A087314 nonn
%O A087314 1,1
%A A087314 _Amarnath Murthy_, Sep 03 2003
%E A087314 More terms from _David Wasserman_, May 02 2005