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Search: id:A018920
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| A018920 |
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Pisot sequence T(3,10). |
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+0
1
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| 3, 10, 33, 108, 353, 1153, 3766, 12300, 40172, 131202, 428506, 1399501, 4570771, 14928140, 48755311, 159234864, 520061125, 1698519827, 5547366384, 18117700664, 59172417076, 193257136076, 631177877968, 2061427183105, 6732621943159, 21988745758766
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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D. W. Boyd, Linear recurrence relations for some generalized Pisot sequences, Advances in Number Theory ( Kingston ON, 1991) 333-340, Oxford Sci. Publ., Oxford Univ. Press, New York, 1993.
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FORMULA
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a(n) = 3a(n-1) + a(n-2) - a(n-4) - a(n-5) - a(n-6) (holds at least up to n = 1000).
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CROSSREFS
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See A008776 for definitions of Pisot sequences.
Sequence in context: A049219 A126184 A060557 this_sequence A006190 A020704 A113299
Adjacent sequences: A018917 A018918 A018919 this_sequence A018921 A018922 A018923
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KEYWORD
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nonn
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AUTHOR
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R. K. Guy (rkg(AT)cpsc.ucalgary.ca)
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EXTENSIONS
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Corrected by David W. Wilson (davidwwilson(AT)comcast.net)
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