id:A049854 - OEIS Search Results

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

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1, 3, 3, 4, 8, 15, 26, 45, 79, 139, 244, 428, 751, 1318, 2313, 4059, 7123, 12500, 21936, 38495, 67554, 118549, 208039, 365083, 640676, 1124308, 1973023, 3462414, 6076113, 10662835, 18711971, 32837220, 57625304, 101125359 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=2*a(n-1)-a(n-2)+a(n-3); 3 initial terms required.`
	CROSSREFS	`Sequence in context: A137418 A019466 A111573 this_sequence A086239 A016605 A060372` `Adjacent sequences: A049851 A049852 A049853 this_sequence A049855 A049856 A049857`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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