%I #12 Dec 22 2018 13:37:38
%S -1,3,-28,259,-3126,46632,-823544,16777475,-387420517,9999996878,
%T -285311670612,8916100495144,-302875106592254,11112006824734476,
%U -437893890380862528,18446744073726329091,-827240261886336764178,39346408075296150201567
%N Sum_{d divides n} (-d)^d.
%H Seiichi Manyama, <a href="/A076723/b076723.txt">Table of n, a(n) for n = 1..386</a>
%F G.f.: Sum_{n>0} (-n*x)^n/(1-x^n).
%o (PARI) a(n) = sumdiv(n, d, (-d)^d); \\ _Michel Marcus_, Dec 22 2018
%Y Cf. A062796, A321385.
%K sign
%O 1,2
%A _Vladeta Jovovic_, Oct 27 2002