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A024504 a(n) = floor(C(2n,n)/2^(n+1)). 0
0, 0, 0, 1, 2, 3, 7, 13, 25, 47, 90, 172, 330, 634, 1224, 2366, 4585, 8902, 17309, 33707, 65730, 128330, 250828, 490750, 961053, 1883664, 3694880, 7252914, 14246796, 28002324, 55071237, 108365983, 213345529, 420226042, 828092495, 1632525204 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

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

MATHEMATICA

Table[ Floor[ Binomial[2n, n]/2^(n + 1)], {n, 0, 35}] (* Robert G. Wilson v, Nov 26 2004 *)

CROSSREFS

Sequence in context: A213968 A213967 A128695 * A256494 A088172 A048573

Adjacent sequences:  A024501 A024502 A024503 * A024505 A024506 A024507

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Robert G. Wilson v, Nov 26 2004

STATUS

approved

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Last modified July 15 02:31 EDT 2020. Contains 335762 sequences. (Running on oeis4.)