|
Search: id:A006469
|
|
|
| A006469 |
|
Number of rooted planar maps.
(Formerly M4727)
|
|
+0
1
|
|
| 10, 79, 340, 1071, 2772, 6258, 12768, 24090, 42702, 71929
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
REFERENCES
|
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
Walsh, T. R. S.; Lehman, A. B.; Counting rooted maps by genus. III: Nonseparable maps. J. Combinatorial Theory Ser. B 18 (1975), 222-259.
|
|
FORMULA
|
G.f.: (10+9x-3x^2)/(1-x)^7 (conjectured). - Ralf Stephan, Apr 23 2004
|
|
CROSSREFS
|
Sequence in context: A082136 A153596 A056986 this_sequence A081905 A016138 A006329
Adjacent sequences: A006466 A006467 A006468 this_sequence A006470 A006471 A006472
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
Search completed in 0.002 seconds
|
