id:A049863 - 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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0, 3, 4, 7, 11, 21, 39, 74, 138, 258, 481, 898, 1676, 3129, 5841, 10904, 20355, 37998, 70933, 132415, 247187, 461439, 861396, 1608020, 3001788, 5603619, 10460614, 19527460, 36453089, 68049183, 127031520, 237137411, 442678728 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=2*a(n-1)-a(n-3)+a(n-4); 4 initial terms required.`
	CROSSREFS	`Sequence in context: A042593 A041018 A072255 this_sequence A025068 A049928 A002364` `Adjacent sequences: A049860 A049861 A049862 this_sequence A049864 A049865 A049866`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

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