A020708 - OEIS

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A020708

Pisot sequences E(4,9), P(4,9).

4, 9, 20, 44, 97, 214, 472, 1041, 2296, 5064, 11169, 24634, 54332, 119833, 264300, 582932, 1285697, 2835694, 6254320, 13794337, 30424368, 67103056, 148000449, 326425266, 719953588, 1587907625, 3502240516, 7724434620, 17036776865, 37575794246, 82876023112 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	FORMULA	`a(n) = 2a(n-1) + a(n-3) (holds at least up to n = 1000).`
	CROSSREFS	`Subsequence of A008998. See A008776 for definitions of Pisot sequences.` `Sequence in context: A132175 A019493 A019492 * A144686 A144685 A109110` `Adjacent sequences: A020705 A020706 A020707 * A020709 A020710 A020711`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified February 13 21:09 EST 2012. Contains 205561 sequences.