|
Search: id:A063688
|
|
|
| A063688 |
|
Number of 2-trees rooted at a triangle. |
|
+0
1
|
|
| 1, 1, 3, 10, 39, 164, 746, 3474, 16658, 81166, 401169, 2004517, 10110757, 51402250, 263133142, 1355126922, 7016115632, 36498130908, 190673015083, 999932115039, 5262094054524, 27779114013628, 147072756065567, 780722981065006
(list; graph; listen)
|
|
|
OFFSET
|
1,3
|
|
|
REFERENCES
|
F. Harary and E. M. Palmer, Graphical Enumeration, Academic Press, NY, 1973, p. 76, Eq. (3.5.13).
|
|
CROSSREFS
|
Cf. A005750, A058870, A058866, A054581.
Sequence in context: A123768 A005750 A063022 this_sequence A083862 A137590 A124532
Adjacent sequences: A063685 A063686 A063687 this_sequence A063689 A063690 A063691
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Vladeta Jovovic (vladeta(AT)Eunet.yu), Aug 22 2001
|
|
|
Search completed in 0.002 seconds
|
