|
|
A136797
|
|
Number of labeled marked trees with n nodes.
|
|
3
|
|
|
2, 8, 96, 2048, 64000, 2654208, 137682944, 8589934592, 626913312768, 52428800000000, 4944974716076032, 519400496868360192, 60134924074807721984, 7609328110443312447488, 1044855521280000000000000, 154742504910672534362390528, 24588026787102364507838611456
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
A marked tree is a tree where each node and edge is marked as + or -.
|
|
REFERENCES
|
F. Bergeron, G. Labelle and P. Leroux, Combinatorial Species and Tree-Like Structures, Cambridge, 1998, p. 293 (4.1.60).
|
|
LINKS
|
|
|
FORMULA
|
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|