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Search: id:A081005
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| A081005 |
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Fibonacci(4n+3)+1, or Fibonacci(2n+1)*Lucas(2n+2). |
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+0
1
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| 3, 14, 90, 611, 4182, 28658, 196419, 1346270, 9227466, 63245987, 433494438, 2971215074, 20365011075, 139583862446, 956722026042, 6557470319843, 44945570212854, 308061521170130, 2111485077978051, 14472334024676222
(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)+1) od:
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CROSSREFS
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Cf. A000045 (Fibonacci numbers), A000032 (Lucas numbers).
Sequence in context: A038170 A007840 A007549 this_sequence A074518 A088789 A029767
Adjacent sequences: A081002 A081003 A081004 this_sequence A081006 A081007 A081008
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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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