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A013983
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Expansion of 1/(1-x^2-x^3-x^4-x^5-x^6).
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3
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1, 0, 1, 1, 2, 3, 5, 7, 12, 18, 29, 45, 71, 111, 175, 274, 431, 676, 1062, 1667, 2618, 4110, 6454, 10133, 15911, 24982, 39226, 61590, 96706, 151842, 238415, 374346, 587779, 922899, 1449088, 2275281, 3572527
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OFFSET
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0,5
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COMMENTS
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Number of compositions of n into parts p where 2 <= p < = 6. [Joerg Arndt, Jun 24 2013]
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LINKS
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FORMULA
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MATHEMATICA
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CoefficientList[Series[1 / (1 - x^2 - x^3 - x^4 - x^5 - x^6), {x, 0, 50}], x] (* Vincenzo Librandi, Jun 23 2013 *)
LinearRecurrence[{0, 1, 1, 1, 1, 1}, {1, 0, 1, 1, 2, 3}, 50] (* Harvey P. Dale, Dec 31 2013 *)
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PROG
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(Magma) m:=40; R<x>:=PowerSeriesRing(Integers(), m); Coefficients(R!(1/(1-x^2-x^3-x^4-x^5-x^6))); // Vincenzo Librandi, Jun 24 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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