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Search: id:A081072
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| A081072 |
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Fibonacci(4n) + 3, or Fibonacci(2n+2)*Lucas(2n-2). |
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+0
1
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| 3, 6, 24, 147, 990, 6768, 46371, 317814, 2178312, 14930355, 102334158, 701408736, 4807526979, 32951280102, 225851433720, 1548008755923, 10610209857726, 72723460248144, 498454011879267, 3416454622906710, 23416728348467688
(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 40 do printf(`%d, `, fibonacci(4*n)+3) od:
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CROSSREFS
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Cf. A000045 (Fibonacci numbers).
Adjacent sequences: A081069 A081070 A081071 this_sequence A081073 A081074 A081075
Sequence in context: A054718 A132390 A109155 this_sequence A000717 A076020 A018964
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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 04, 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 05, 2003
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