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Search: id:A024486
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A024486 a(n) = (1/(2n+1))*Multinomial(3n; n,n,n). +0
1
1, 2, 18, 240, 3850, 68796, 1319472, 26604864, 556794810, 11993338500, 264333180540, 5935956324480, 135389270500848 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A153647 A052726 A155666 this_sequence A052635 A117514 A138437

Adjacent sequences: A024483 A024484 A024485 this_sequence A024487 A024488 A024489

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

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