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Search: id:A081011
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| A081011 |
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Fibonacci(4n+3)+2, or Fibonacci(2n+3)*Lucas(2n). |
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+0
1
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| 4, 15, 91, 612, 4183, 28659, 196420, 1346271, 9227467, 63245988, 433494439, 2971215075, 20365011076, 139583862447, 956722026043, 6557470319844, 44945570212855, 308061521170131, 2111485077978052, 14472334024676223
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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Hugh C. Williams, Edouard Lucas and Primality Testing, John Wiley and Sons, 1998, p. 75
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FORMULA
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a(n) = 8a(n-1)-8a(n-2)+a(n-3)
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MAPLE
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with(combinat) for n from 0 to 25 do printf(`%d, `, fibonacci(4*n+3)+2) od
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CROSSREFS
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Cf. A000045 (Fibonacci numbers), A000032 (Lucas numbers).
Sequence in context: A034496 A079155 A076900 this_sequence A008829 A013193 A040025
Adjacent sequences: A081008 A081009 A081010 this_sequence A081012 A081013 A081014
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KEYWORD
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nonn,easy
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AUTHOR
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R. K. Guy (rkg(AT)cpsc.ucalgary.ca), Mar 01, 2003
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EXTENSIONS
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More terms and Maple code from James A. Sellers (sellersj(AT)math.psu.edu), Mar 03, 2003
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