id:A116732 - OEIS Search Results

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a(n) = a(n-1) + a(n-2) + a(n-3) - a(n-4).

+0
3

0, 0, 0, 1, 1, 2, 4, 6, 11, 19, 32, 56, 96, 165, 285, 490, 844, 1454, 2503, 4311, 7424, 12784, 22016, 37913, 65289, 112434, 193620, 333430, 574195, 988811, 1702816, 2932392, 5049824, 8696221, 14975621, 25789274, 44411292, 76479966 (list; graph; listen)

	OFFSET	`0,6`
	COMMENT	`An example of a "symmetric" quartic recurrence and has some expected divisibility properties.`
	FORMULA	`G.f.: x^3/(x^4 - x^3 - x^2 - x + 1).`
	CROSSREFS	`Close to A000786 (& A048239), A115992, A115993. Cf. A116201.` `Sequence in context: A115992 A115993 A136424 this_sequence A048239 A000786 A000694` `Adjacent sequences: A116729 A116730 A116731 this_sequence A116733 A116734 A116735`
	KEYWORD	`nonn,easy`
	AUTHOR	`Richard Guy (rkg(AT)cpsc.ucalgary.ca), Mar 23 2008`
	EXTENSIONS	`More terms from Max Alekseyev, Mar 23 2008`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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