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A017869
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Expansion of 1/(1-x^8-x^9-x^10-x^11).
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1
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1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 3, 6, 10, 12, 12, 10, 6, 4, 5, 10, 20, 31, 40, 44, 40, 32, 25, 25, 39, 66, 101, 135, 155, 156, 141, 122, 121, 155, 231, 341, 457, 547, 587, 574, 540
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OFFSET
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0,18
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COMMENTS
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Number of compositions of n into parts p where 8 <= p <= 11. [Joerg Arndt, Jun 29 2013]
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,1,1,1,1).
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FORMULA
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G.f.: 1/(1-x^8-x^9-x^10-x^11).
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MATHEMATICA
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CoefficientList[Series[1 / (1 - Total[x^Range[8, 11]]), {x, 0, 70}], x] (* Vincenzo Librandi, Jun 29 2013 *)
LinearRecurrence[{0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1}, {1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1}, 60] (* Harvey P. Dale, Dec 31 2018 *)
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PROG
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(Magma) m:=70; R<x>:=PowerSeriesRing(Integers(), m); Coefficients(R!(1/(1-x^8-x^9-x^10-x^11))); /* or */ I:=[1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1]; [n le 11 select I[n] else Self(n-8)+Self(n-9)+Self(n-10)+Self(n-11): n in [1..70]]; // Vincenzo Librandi, Jun 29 2013
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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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