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A006661 Number of meanders in which first bridge is 5.
(Formerly M2286)
1
3, 3, 7, 11, 28, 57, 155, 353, 1003, 2458, 7214, 18575, 55880, 149183, 457639, 1255933, 3914103, 10978240, 34663182, 98953078, 315884786, 915008430, 2948378068, 8645874055, 28084475514, 83222134020 (list; graph; refs; listen; history; text; internal format)
OFFSET
5,1
REFERENCES
S. K. Lando and A. K. Zvonkin "Plane and projective meanders", Séries Formelles et Combinatoire Algébrique. Laboratoire Bordelais de Recherche Informatique, Université Bordeaux I, 1991, pp. 287-303.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
S. K. Lando and A. K. Zvonkin , Plane and projective meanders, Séries Formelles et Combinatoire Algébrique. Laboratoire Bordelais de Recherche Informatique, Université Bordeaux I, 1991, pp. 287-303. (Annotated scanned copy)
CROSSREFS
Sequence in context: A279987 A279475 A161815 * A343752 A068626 A126698
KEYWORD
nonn
AUTHOR
EXTENSIONS
Offset corrected terms a(19)-a(30) added, Andrew Howroyd, Dec 15 2015
STATUS
approved

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Last modified March 28 07:33 EDT 2024. Contains 371235 sequences. (Running on oeis4.)