|
%I #10 Dec 27 2021 18:40:39
%S 0,1,10,262,21496,6433336,7566317200,35247649746352,
%T 648839620390462336,47230175230392839683456,
%U 13617860445102311268975051520,15577054031612736747163633737901312
%N Number of disconnected labeled digraphs with n nodes.
%H Andrew Howroyd, <a href="/A054593/b054593.txt">Table of n, a(n) for n = 1..50</a>
%F a(n) = 2^(n*(n-1)) - A003027(n).
%Y The unlabeled case is A054590.
%Y Cf. A003027, A053763 (not necessarily connected), A054592.
%K easy,nonn
%O 1,3
%A _Vladeta Jovovic_, Apr 15 2000
| 