id:A049875 - 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.

+0
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2, 3, 3, 6, 11, 22, 41, 77, 143, 267, 498, 930, 1736, 3241, 6050, 11294, 21083, 39357, 73470, 137151, 256028, 477943, 892205, 1665533, 3109151, 5804040, 10834752, 20225886, 37756883, 70483054, 131574974, 245618951, 458511731 (list; graph; listen)

	OFFSET	`0,1`
	FORMULA	`a(n)=2*a(n-1)-a(n-3)+a(n-4); 4 initial terms required.`
	CROSSREFS	`Sequence in context: A059191 A124063 A054630 this_sequence A087989 A103356 A028257` `Adjacent sequences: A049872 A049873 A049874 this_sequence A049876 A049877 A049878`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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