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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
Andrew Howroyd, Table of n, a(n) for n = 1..50
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
Adjacent sequences: A054590 A054591 A054592 * A054594 A054595 A054596
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, Apr 15 2000
STATUS
approved

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Last modified October 4 21:32 EDT 2024. Contains 376525 sequences.
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