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A001928
Number of connected topologies with n unlabeled nodes.
(Formerly M1655 N0648)
+0
4
1, 1, 2, 6, 21, 94, 512, 3485, 29515, 314474, 4255727, 73831813, 1653083021, 47941962135, 1803010446411, 87882300251730, 5543501326580737
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.
AT&T Labs Research
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