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1, 2, 8, 34, 146, 627, 2689, 11521, 49337, 211233, 904306, 3871305, 16572812, 70947073, 303719624, 1300203634, 5566087073, 23828058969, 102006385362, 436682772844, 1869410868456, 8002827727921, 34259590954322
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = 9*a(n-1) - 28*a(n-2) + 38*a(n-3) - 20*a(n-4) + a(n-5).
G.f.: -(1-7*x+18*x^2-20*x^3+8*x^4)/(-1+9*x-28*x^2+38*x^3-20*x^4+x^5).
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MATHEMATICA
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CoefficientList[Series[-(1 - 7*x + 18*x^2 - 20*x^3 + 8*x^4)/(-1 + 9*x - 28*x^2 + 38*x^3 - 20*x^4 + x^5), {x, 0, 50}], x] (* G. C. Greubel, Mar 11 2017 *)
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PROG
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(PARI) x='x+O('x^50); Vec(-(1-7*x+18*x^2-20*x^3+8*x^4)/(-1+9*x-28*x^2+38*x^3-20*x^4+x^5)) \\ G. C. Greubel, Mar 11 2017
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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