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A055389
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a(0)=1, then twice the Fibonacci sequence.
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11
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1, 2, 2, 4, 6, 10, 16, 26, 42, 68, 110, 178, 288, 466, 754, 1220, 1974, 3194, 5168, 8362, 13530, 21892, 35422, 57314, 92736, 150050, 242786, 392836, 635622, 1028458, 1664080, 2692538, 4356618, 7049156, 11405774, 18454930, 29860704, 48315634, 78176338
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| G.f.: (1+x-x^2)/(1-x-x^2)
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MATHEMATICA
| Join[{1}, Table[2*Fibonacci[n], {n, 70}]] (* From Vladimir Joseph Stephan Orlovsky, Feb 10 2012 *)
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CROSSREFS
| Essentially the same as A006355.
Sequence in context: A006355 * A163733 A198834 A084202 A053637 A000016
Adjacent sequences: A055386 A055387 A055388 * A055390 A055391 A055392
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KEYWORD
| easy,nonn,changed
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 05 2000
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EXTENSIONS
| More terms from James A. Sellers (sellersj(AT)math.psu.edu), Jul 07 2000
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