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A255875
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a(n) = Fibonacci(n+2) + n - 2.
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1
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1, 3, 6, 10, 16, 25, 39, 61, 96, 152, 242, 387, 621, 999, 1610, 2598, 4196, 6781, 10963, 17729, 28676, 46388, 75046, 121415, 196441, 317835, 514254, 832066, 1346296, 2178337, 3524607, 5702917, 9227496, 14930384, 24157850, 39088203, 63246021, 102334191, 165580178, 267914334
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OFFSET
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1,2
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LINKS
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FORMULA
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G.f.: x*(-1+x^2+x^3) / ( (x^2+x-1)*(x-1)^2 ). - R. J. Mathar, Jul 10 2015
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MATHEMATICA
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PROG
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(PARI) main(size)={return( vector(size, n, fibonacci(n+2)+n-2)); } /* Anders Hellström, Jul 11 2015 */
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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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