id:A021001 - OEIS Search Results

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Pisot sequence P(2,9).

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2

2, 9, 40, 178, 792, 3524, 15680, 69768, 310432, 1381264, 6145920, 27346208, 121676672, 541399104, 2408949760, 10718597248, 47692288512, 212206348544, 944209971200, 4201252581888, 18693430269952, 83176226243584, 370091765514240, 1646719514544128 (list; graph; listen)

	OFFSET	`0,1`
	FORMULA	`Appears to satisfy a(n) = 4a(n-1) + 2a(n-2).`
	CROSSREFS	`See A008776 for definitions of Pisot sequences.` `Adjacent sequences: A020998 A020999 A021000 this_sequence A021002 A021003 A021004` `Sequence in context: A097070 A020728 A107979 this_sequence A038112 A052512 A038156`
	KEYWORD	`nonn`
	AUTHOR	`R. K. Guy (rkg(AT)cpsc.ucalgary.ca)`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

AT&T Labs Research