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A147851
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Expansion of 1/(1 - x^3 - x^4 - x^5 + x^8)^2.
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10
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1, 0, 0, 2, 2, 2, 3, 6, 7, 10, 15, 18, 27, 38, 50, 66, 92, 126, 165, 224, 300, 400, 536, 714, 948, 1258, 1676, 2218, 2932, 3882, 5128, 6768, 8924, 11760, 15479, 20366, 26780, 35174, 46182, 60602, 79473, 104158, 136445, 178654, 233797, 305834, 399881
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OFFSET
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0,4
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (0,0,2,2,2,-1,-2,-5,-2,-1,2,2,2,0,0,-1).
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FORMULA
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a(n) = 2*a(n-3) + 2*a(n-4) + 2*a(n-5) - a(n-6) - 2*a(n-7) - 5*a(n-8) - 2*a(n-9) - a(n-10) + 2*a(n-11) + 2*a(n-12) + 2*a(n-13) - a(n-16). - Franck Maminirina Ramaharo, Nov 02 2018
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MATHEMATICA
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CoefficientList[Series[1/(1 - x^3 - x^4 - x^5 + x^8)^2, {x, 0, 50}], x]
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PROG
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(PARI) x='x+O('x^50); Vec(1/(1-x^3-x^4-x^5+x^8)^2) \\ G. C. Greubel, Nov 03 2018
(Magma) m:=50; R<x>:=PowerSeriesRing(Integers(), m); Coefficients(R!(1/(1 -x^3-x^4-x^5+x^8)^2)); // G. C. Greubel, Nov 03 2018
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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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