id:A049866 - OEIS Search Results

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a(n)=Sum{a(k): k=0,1,2,...,n-4,n-2,n-1}; a(n-3) is not a summand; 3 initial terms required.

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1, 1, 3, 4, 8, 14, 27, 50, 94, 175, 327, 610, 1139, 2126, 3969, 7409, 13831, 25819, 48198, 89974, 167960, 313541, 585306, 1092626, 2039671, 3807577, 7107834, 13268623, 24769340, 46238423, 86316057, 161131397, 300793711 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=2*a(n-1)-a(n-3)+a(n-4); 4 initial terms required.`
	CROSSREFS	`Sequence in context: A000205 A136425 A005907 this_sequence A118355 A026632 A026654` `Adjacent sequences: A049863 A049864 A049865 this_sequence A049867 A049868 A049869`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified July 8 18:40 EDT 2008. Contains 141013 sequences.

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