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A022313
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a(n)=a(n-1)+a(n-2)+1.
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1
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0, 8, 9, 18, 28, 47, 76, 124, 201, 326, 528, 855, 1384, 2240, 3625, 5866, 9492, 15359, 24852, 40212, 65065, 105278, 170344, 275623, 445968, 721592, 1167561, 1889154, 3056716, 4945871, 8002588, 12948460, 20951049, 33899510, 54850560, 88750071, 143600632
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OFFSET
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0,2
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index to sequences with linear recurrences with constant coefficients, signature (2,0,-1)
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FORMULA
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G.f. -x*(-8+7*x) / ( (x-1)*(x^2+x-1) ). a(n) = A022099(n)-1. - R. J. Mathar, Apr 07 2011
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MATHEMATICA
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LinearRecurrence[{2, 0, -1}, {0, 8, 9}, 60] (* From Vladimir Joseph Stephan Orlovsky, Feb 11 2012 *)
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CROSSREFS
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Sequence in context: A159836 A069809 A067544 * A120311 A061414 A071869
Adjacent sequences: A022310 A022311 A022312 * A022314 A022315 A022316
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane.
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STATUS
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approved
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