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A054593 Number of disconnected labeled digraphs with n nodes. 2
0, 1, 10, 262, 21496, 6433336, 7566317200, 35247649746352, 648839620390462336, 47230175230392839683456, 13617860445102311268975051520, 15577054031612736747163633737901312 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
FORMULA
a(n) = 2^(n*(n-1)) - A003027(n).
CROSSREFS
The unlabeled case is A054590.
Cf. A003027, A053763 (not necessarily connected), A054592.
Sequence in context: A084999 A268730 A217911 * A290041 A369423 A160481
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, Apr 15 2000
STATUS
approved

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Last modified April 20 02:14 EDT 2024. Contains 371798 sequences. (Running on oeis4.)