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A017836
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Expansion of 1/(1-x^4-x^5-x^6-x^7-x^8-x^9-x^10-x^11-x^12-x^13-x^14).
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1
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1, 0, 0, 0, 1, 1, 1, 1, 2, 3, 4, 5, 7, 10, 14, 18, 25, 35, 49, 66, 90, 124, 172, 236, 323, 443, 610, 839, 1152, 1581, 2173, 2987, 4104, 5636, 7743, 10640, 14620, 20084, 27591, 37908, 52085, 71559, 98311, 135067
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OFFSET
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0,9
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COMMENTS
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Number of compositions (ordered partitions) of n into parts 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 and 14. - Ilya Gutkovskiy, May 25 2017
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (0,0,0,1,1,1,1,1,1,1,1,1,1,1).
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FORMULA
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a(n) = a(n-4) +a(n-5) +a(n-6) +a(n-7) +a(n-8) +a(n-9) +a(n-10) +a(n-11) +a(n-12) +a(n-13) +a(n-14) for n>13. - Vincenzo Librandi, Jun 27 2013
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MATHEMATICA
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CoefficientList[Series[1 / (1 - Total[x^Range[4, 14]]), {x, 0, 50}], x] (* Vincenzo Librandi, Jun 27 2013 *)
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PROG
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(Magma) m:=50; R<x>:=PowerSeriesRing(Integers(), m); Coefficients(R!(1/(1-x^4-x^5-x^6-x^7-x^8-x^9-x^10-x^11-x^12-x^13-x^14))); // Vincenzo Librandi, Jun 27 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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