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A060160
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2^n - 1 + Fibonacci(n - 1)*2^(n+1).
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2
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1, 11, 23, 79, 223, 703, 2175, 6911, 22015, 70655, 227327, 733183, 2367487, 7651327, 24739839, 80019455, 258867199, 837550079, 2710044671, 8769241087, 28376563711, 91825897471, 297149661183, 961586135039, 3111737360383, 10069752152063
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,200
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FORMULA
| a(n)= 5*a(n-1) -4*a(n-2) -8*a(n-3) +8*a(n-4). G.f.: x*(1+6*x-28*x^2+16*x^3)/ ((1-x) * (2*x-1) * (4*x^2+2*x-1)). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 06 2010]
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MAPLE
| with(combinat, fibonacci): seq(2^n - 1 + fibonacci(n - 1)*2^(n+1), n=1..25);
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PROG
| (PARI) { for (n=1, 200, write("b060160.txt", n, " ", 2^n - 1 + fibonacci(n - 1)*2^(n + 1)); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 02 2009]
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CROSSREFS
| Cf. A060161, A000045 (Fibonacci).
Sequence in context: A195463 A104066 A184394 * A158021 A050767 A145918
Adjacent sequences: A060157 A060158 A060159 * A060161 A060162 A060163
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KEYWORD
| nonn
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AUTHOR
| Pieter Gosselink (pieter_gosselink(AT)lotus.com), Mar 12 2001
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EXTENSIONS
| More terms from Asher Natan Auel (auela(AT)reed.edu), Mar 16 2001
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