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A006123 Generalized ballot numbers.
(Formerly M1215)
7
1, 1, 2, 4, 10, 26, 75, 215 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=0..7.

C. L. Mallows & N. J. A. Sloane, Emails, May 1991

C. L. Mallows & N. J. A. Sloane, Emails, Jun. 1991

CROSSREFS

Sequence in context: A089429 A049143 A089404 * A006251 A049401 A294672

Adjacent sequences:  A006120 A006121 A006122 * A006124 A006125 A006126

KEYWORD

nonn,more

AUTHOR

Colin Mallows

STATUS

approved

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Last modified February 23 23:56 EST 2018. Contains 299595 sequences. (Running on oeis4.)