A024486 - OEIS

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A024486

a(n) = (1/(2n+1))*Multinomial(3n; n,n,n).

1, 2, 18, 240, 3850, 68796, 1319472, 26604864, 556794810, 11993338500, 264333180540, 5935956324480, 135389270500848 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A153647 A052726 A155666 * A052635 A168562 A117514` `Adjacent sequences: A024483 A024484 A024485 * A024487 A024488 A024489`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified February 14 05:09 EST 2012. Contains 205570 sequences.