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A081075
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a(n) = Fibonacci(4n+2) - 3.
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0
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5, 52, 374, 2581, 17708, 121390, 832037, 5702884, 39088166, 267914293, 1836311900, 12586269022, 86267571269, 591286729876, 4052739537878, 27777890035285, 190392490709132, 1304969544928654, 8944394323791461
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OFFSET
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1,1
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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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LINKS
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FORMULA
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a(n) = 8*a(n-1) - 8*a(n-2) + a(n-3).
G.f.: x*(2*x^2-12*x-5)/((x-1)*(x^2-7*x+1)). - Colin Barker, Jun 22 2012
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MAPLE
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with(combinat): for n from 1 to 40 do printf(`%d, `, fibonacci(4*n+2)-3) od: # James A. Sellers, Mar 05 2003
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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