|
Search: id:A006657
|
|
|
| A006657 |
|
Closed meanders with 2 components and 2n bridges.
(Formerly M2037)
|
|
+0
3
|
|
| 2, 12, 84, 640, 5236, 45164, 406012, 3772008, 35994184, 351173328, 3490681428
(list; graph; listen)
|
|
|
OFFSET
|
2,1
|
|
|
REFERENCES
|
S. K. Lando and A. K. Zvonkin "Plane and projective meanders", S\'{e}ries Formelles et Combinatoire Alg\'{e}brique. Laboratoire Bordelais de Recherche Informatique, Universit\'{e} Bordeaux I, 1991, pp. 287-303.
|
|
LINKS
|
P. Di Francesco, O. Golinelli and E. Guitter, Meander, folding and arch statistics.
|
|
CROSSREFS
|
Cf. A005315.
A column of triangle A008828.
Adjacent sequences: A006654 A006655 A006656 this_sequence A006658 A006659 A006660
Sequence in context: A092850 A052864 A130464 this_sequence A105927 A052887 A052867
|
|
KEYWORD
|
nonn,nice
|
|
AUTHOR
|
njas, Simon Plouffe (plouffe(AT)math.uqam.ca)
|
|
|
Search completed in 0.002 seconds
|
