id:A025256 - OEIS Search Results

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a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-3)*a(3) for n >= 4.

+0
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1, 1, 3, 3, 6, 18, 42, 105, 291, 792, 2181, 6177, 17628, 50679, 147255, 430917, 1268292, 3754926, 11172828, 33389040, 100181994, 301682709, 911436117, 2761852011, 8392005462, 25563691341, 78053071611, 238830914937, 732247187460, 2249217635238 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`G.f.: (1+x+x^2-sqrt(1-2x-x^2-10x^3+x^4))/2. - Vladeta Jovovic (vladeta(AT)Eunet.yu), May 07 2003`
	CROSSREFS	`Adjacent sequences: A025253 A025254 A025255 this_sequence A025257 A025258 A025259` `Sequence in context: A123286 A132818 A134068 this_sequence A052560 A019235 A103895`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

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