id:A049867 - 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, 4, 5, 10, 17, 33, 61, 115, 214, 400, 746, 1393, 2600, 4854, 9061, 16915, 31576, 58945, 110036, 205411, 383453, 715815, 1336255, 2494468, 4656574, 8692708, 16227203, 30292300, 56548466, 105562437, 197059777, 367863388 (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: A058594 A022309 A049897 this_sequence A054173 A049898 A166577` `Adjacent sequences: A049864 A049865 A049866 this_sequence A049868 A049869 A049870`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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