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A017868
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Expansion of 1/(1-x^8-x^9-x^10).
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1
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1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 2, 3, 2, 1, 0, 0, 0, 1, 3, 6, 7, 6, 3, 1, 0, 1, 4, 10, 16, 19, 16, 10, 4, 2, 5, 15, 30, 45, 51, 45, 30, 16, 11, 22, 50, 90, 126, 141, 126, 91, 57, 49, 83, 162, 266, 357, 393, 358
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OFFSET
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0,18
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COMMENTS
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Number of compositions (ordered partitions) of n into parts 8, 9 and 10. - Ilya Gutkovskiy, May 26 2017
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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).
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FORMULA
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MATHEMATICA
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CoefficientList[Series[1/(1 - Total[x^Range[8, 10]]), {x, 0, 70}], x] (* Vincenzo Librandi, Jun 28 2013 *)
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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))); /* or */ I:=[1, 0, 0, 0, 0, 0, 0, 0, 1, 1]; [n le 10 select I[n] else Self(n-8)+Self(n-9)+Self(n-10): n in [1..70]]; // Vincenzo Librandi, Jun 28 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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