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A025883 Expansion of 1/((1-x^5)*(1-x^7)*(1-x^9)). 5

%I #13 Nov 19 2022 02:20:21

%S 1,0,0,0,0,1,0,1,0,1,1,0,1,0,2,1,1,1,1,2,1,2,1,2,2,2,2,2,3,2,3,2,3,3,

%T 3,4,3,4,3,4,4,4,5,4,5,5,5,5,5,6,6,6,6,6,7,7,7,7,7,8,8,8,8,9,9,9,9,9,

%U 10,10,11,10,11,11,11,12,11

%N Expansion of 1/((1-x^5)*(1-x^7)*(1-x^9)).

%C a(n) is the number of partitions of n into parts 5, 7, and 9. - _Joerg Arndt_, Nov 19 2022

%H G. C. Greubel, <a href="/A025883/b025883.txt">Table of n, a(n) for n = 0..5000</a>

%H <a href="/index/Rec#order_21">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,1,0,1,0,1,0,0,-1,0,-1,0,-1,0,0,0,0,1).

%t CoefficientList[Series[1/((1-x^5)(1-x^7)(1-x^9)),{x,0,100}],x] (* or *)

%t LinearRecurrence[{0,0,0,0,1,0,1,0,1,0,0,-1,0,-1,0,-1,0,0,0,0,1},{1,0,0,0,0,1, 0,1,0,1,1,0,1,0,2,1,1,1,1,2,1},100] (* _Harvey P. Dale_, Jun 24 2021 *)

%o (Magma) R<x>:=PowerSeriesRing(Rationals(), 90); Coefficients(R!( 1/((1-x^5)*(1-x^7)*(1-x^9)) )); // _G. C. Greubel_, Nov 18 2022

%o (SageMath)

%o def A025883_list(prec):

%o P.<x> = PowerSeriesRing(ZZ, prec)

%o return P( 1/((1-x^5)*(1-x^7)*(1-x^9)) ).list()

%o A025883_list(90) # _G. C. Greubel_, Nov 18 2022

%Y Cf. A025882, A025884, A025885, A025886.

%K nonn,easy

%O 0,15

%A _N. J. A. Sloane_

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Last modified April 25 05:18 EDT 2024. Contains 371964 sequences. (Running on oeis4.)