|
| |
|
|
A032200
|
|
Number of rooted compound windmills (mobiles) of n nodes.
|
|
7
| |
|
|
1, 1, 2, 4, 9, 20, 51, 128, 345, 940, 2632, 7450, 21434, 62174, 182146, 537369, 1596133, 4767379, 14312919, 43162856, 130695821, 397184252, 1211057426, 3703794849, 11358759346, 34923477315, 107627138308, 332404636811
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,3
|
|
|
REFERENCES
| F. Bergeron, G. Labelle and P. Leroux, Combinatorial Species and Tree-Like Structures, Camb. 1998, p. 241 (3.3.84).
|
|
|
LINKS
| C. G. Bower, Transforms (2)
Index entries for sequences related to mobiles
|
|
|
FORMULA
| Shifts left under "CIK" (necklace, indistinct, unlabeled) transform.
|
|
|
CROSSREFS
| Cf. A029768, A038037, A055340.
Sequence in context: A171887 A027881 A002861 * A130969 A034750 A079060
Adjacent sequences: A032197 A032198 A032199 * A032201 A032202 A032203
|
|
|
KEYWORD
| nonn,eigen
|
|
|
AUTHOR
| Christian G. Bower (bowerc(AT)usa.net)
|
| |
|
|
