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A054577 A Catalan-like sequence. 0
0, 1, 4, 11, 36, 115, 381, 1287, 4420, 15396, 54264, 193154, 693373, 2507287, 9124560, 33393355, 122821380, 453756765, 1683107800, 6265751310, 23402516280, 87670790155, 329337229104, 1240292449350, 4681874312509 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
REFERENCES
Felix Goldberg, A problem relating to a family of Catalan-like sequences, forthcoming.
LINKS
FORMULA
a(n) = Floor( 1/(n+k)*C(pn, n) ), where k=2, p=2.
EXAMPLE
a(6)=115 because 1/(6+2)*C(12,6) is 115.5 and taking the floor we obtain 115.
CROSSREFS
Sequence in context: A339034 A114248 A149237 * A206687 A106640 A109268
KEYWORD
nonn
AUTHOR
Felix Goldberg (sgefelix(AT)t2.technion.ac.il), Apr 11 2000
EXTENSIONS
More terms from James A. Sellers, Apr 12 2000
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)