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A024505 a(n) = [ C(2n,n)/2^(n+2) ]. 0
0, 0, 0, 0, 1, 1, 3, 6, 12, 23, 45, 86, 165, 317, 612, 1183, 2292, 4451, 8654, 16853, 32865, 64165, 125414, 245375, 480526, 941832, 1847440, 3626457, 7123398, 14001162, 27535618, 54182991, 106672764, 210113021, 414046247, 816262602 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,7

LINKS

Table of n, a(n) for n=0..35.

CROSSREFS

Sequence in context: A018180 A079735 A050243 * A005256 A097979 A215983

Adjacent sequences:  A024502 A024503 A024504 * A024506 A024507 A024508

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from James A. Sellers, Feb 06 2000

STATUS

approved

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Last modified October 21 11:15 EDT 2014. Contains 248377 sequences.