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Search: id:A024485
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A024485 a(n) = (2/(3n-1))*C(3n,n). +0
1
-2, 3, 6, 21, 90, 429, 2184, 11628, 63954, 360525, 2072070, 12096045, 71524440, 427496076, 2578547760, 15675792072, 95951017602, 590842763469, 3657598059570, 22749427475775, 142096423925610 (list; graph; listen)
OFFSET

0,1

MAPLE

[seq((2/(3*n-1))*binomial(3*n, n), n=0..40)];

CROSSREFS

Sequence in context: A025239 A127294 A012924 this_sequence A013155 A007501 A015773

Adjacent sequences: A024482 A024483 A024484 this_sequence A024486 A024487 A024488

KEYWORD

sign

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified July 4 18:25 EDT 2008. Contains 140886 sequences.


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