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 A363662 #12 Jul 12 2023 01:02:13
%S A363662 2,18,128,1590,19002,353304,6591776,154083654,3878583770,110647791078,
%T A363662 3423740752764,116116072618104,4240251502692142,166761491097360240,
%U A363662 7006327371058071648,313637735782416564806,14890324713956395361406,747610406539465959084870
%N A363662 a(n) = Sum_{d|n} (n/d)^n * binomial(d+n,n).
%F A363662 a(n) = [x^n] Sum_{k>0} (1/(1 - (k*x)^k)^(n+1) - 1).
%t A363662 a[n_] := DivisorSum[n, (n/#)^n * Binomial[# + n, n] &]; Array[a, 20] (* _Amiram Eldar_, Jul 12 2023 *)
%o A363662 (PARI) a(n) = sumdiv(n, d, (n/d)^n*binomial(d+n, n));
%Y A363662 Cf. A363646, A363647, A363648.
%Y A363662 Cf. A023887, A363660, A363661.
%K A363662 nonn
%O A363662 1,1
%A A363662 _Seiichi Manyama_, Jun 14 2023