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A054968
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3*Fibonacci(n) - 11.
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1
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4, 13, 28, 52, 91, 154, 256, 421, 688, 1120, 1819, 2950, 4780, 7741, 12532, 20284, 32827, 53122, 85960, 139093, 225064, 364168, 589243, 953422, 1542676, 2496109, 4038796, 6534916, 10573723, 17108650, 27682384, 44791045, 72473440, 117264496, 189737947
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OFFSET
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5,1
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LINKS
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FORMULA
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G.f.: x^5*(2*x^2+5*x+4) / ((x-1)*(x^2+x-1)). - Colin Barker, Dec 01 2014
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PROG
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(PARI) Vec(x^5*(2*x^2+5*x+4)/((x-1)*(x^2+x-1)) + O(x^100)) \\ Colin Barker, Dec 01 2014
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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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STATUS
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approved
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