id:A049876 - 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, 4, 7, 13, 25, 47, 88, 164, 306, 571, 1066, 1990, 3715, 6935, 12946, 24167, 45114, 84217, 157213, 293479, 547855, 1022714, 1909162, 3563948, 6653037, 12419626, 23184466, 43279843, 80793097, 150821354, 281547331, 525581408 (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: A137495 A099779 A000690 this_sequence A049795 A014251 A098010` `Adjacent sequences: A049873 A049874 A049875 this_sequence A049877 A049878 A049879`
	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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