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 A279017 #7 Dec 03 2016 12:06:26
%S A279017 0,1,5,139,35692,111565148,5205269945088,4286767657466006784,
%T A279017 71920030250887607243833344,27863293344390107424172413346185216,
%U A279017 278632933465479015464665989671020186828800000,79497227734495207011816776516244120065118266248396800000
%N A279017 a(n) = unreduced numerator in Sum_{k=1..n}(1/k^k).
%H A279017 Daniel Suteu, <a href="/A279017/b279017.txt">Table of n, a(n) for n = 0..19</a>
%H A279017 Wikipedia, <a href="https://en.wikipedia.org/wiki/Sophomore's_dream">Sophomore's dream</a>.
%F A279017 a(n) ~ A073009 * A002109(n).
%F A279017 a(0) = 0, a(n) = n^n * a(n-1) + A002109(n-1).
%o A279017 (PARI) sum(k=1, n, 1/k^k) * prod(k=1, n, k^k)
%Y A279017 Cf. A073009.
%K A279017 nonn,easy
%O A279017 0,3
%A A279017 _Daniel Suteu_, Dec 03 2016