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A006483
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a(n) = Fibonacci(n)*2^n + 1.
(Formerly M2502)
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6
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1, 3, 5, 17, 49, 161, 513, 1665, 5377, 17409, 56321, 182273, 589825, 1908737, 6176769, 19988481, 64684033, 209321985, 677380097, 2192048129, 7093616641, 22955425793, 74285318145, 240392339457, 777925951489, 2517421260801, 8146546327553, 26362777698305
(list;
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listen;
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OFFSET
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0,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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FORMULA
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G.f.: -(-1+6*x^2)/((1-x)*(1-2*x-4*x^2)).
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MAPLE
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MATHEMATICA
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CoefficientList[Series[(-(- 1 + 6 x^2)) / ((1 - x) (1 - 2 x - 4 x^2)), {x, 0, 50}], x] (* Vincenzo Librandi, Jun 09 2013 *)
LinearRecurrence[{3, 2, -4}, {1, 3, 5}, 40] (* Harvey P. Dale, Aug 01 2021 *)
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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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Dennis S. Kluk (mathemagician(AT)ameritech.net)
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EXTENSIONS
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STATUS
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approved
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