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A020750
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Pisot sequence T(5,9).
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0
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5, 9, 16, 28, 49, 85, 147, 254, 438, 755, 1301, 2241, 3860, 6648, 11449, 19717, 33955, 58474, 100698, 173411, 298629, 514265, 885608, 1525092, 2626337, 4522773, 7788595, 13412614, 23097646, 39776083, 68497749, 117958865, 203135052, 349815584, 602411753
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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FORMULA
| a(n) = 2a(n-1) - 2a(n-4) + a(n-5) (holds at least up to n = 1000).
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MATHEMATICA
| LinearRecurrence[{2, 0, 0, -2, 1}, {5, 9, 16, 28, 49}, 50] (* From Harvey P. Dale, Jul 14 2011 *)
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CROSSREFS
| See A008776 for definitions of Pisot sequences.
Sequence in context: A072174 A188555 A020958 * A020713 A090990 A088495
Adjacent sequences: A020747 A020748 A020749 * A020751 A020752 A020753
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KEYWORD
| nonn
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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