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Search: id:A007831
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A007831 Number of edge-labeled series-reduced trees with n nodes. +0
1
1, 0, 1, 1, 16, 61, 806, 6329, 89272, 1082281, 17596162, 284074165, 5407229972, 107539072733, 2380274168806, 55833426732529, 1418006883852784, 38195636967960913, 1097755724834189834, 33345176998235584301 (list; graph; listen)
OFFSET

1,5
LINKS

P. J. Cameron, Counting two-graphs related to trees, Elec. J. Combin., Vol. 2, #R4.

Index entries for sequences related to trees

CROSSREFS

Sequence in context: A031190 A043229 A044009 this_sequence A118254 A066391 A022289

Adjacent sequences: A007828 A007829 A007830 this_sequence A007832 A007833 A007834

KEYWORD

nonn

AUTHOR

Peter Cameron [ P.J.Cameron(AT)qmw.ac.uk ]

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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