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Expansion of 1/((1-x^2)(1-x^3)(1-x^9)(1-x^11)).
1

%I #17 Sep 08 2022 08:44:50

%S 1,0,1,1,1,1,2,1,2,3,2,4,4,4,5,6,5,7,8,7,10,10,11,12,14,13,16,17,17,

%T 20,21,22,24,27,26,30,32,32,36,38,39,42,46,45,51,53,54,59,62,63,68,72,

%U 72,79,82,84,90,94,96,102,107

%N Expansion of 1/((1-x^2)(1-x^3)(1-x^9)(1-x^11)).

%H Vincenzo Librandi, <a href="/A029166/b029166.txt">Table of n, a(n) for n = 0..5000</a>

%H <a href="/index/Rec#order_25">Index entries for linear recurrences with constant coefficients</a>, signature (0,1,1,0,-1,0,0,0,1,0,0,-1,-1,0,0,1,0,0,0,-1,0,1,1,0,-1).

%t CoefficientList[Series[1/((1 - x^2) (1 - x^3) (1 - x^9) (1 -x^11)), {x, 0, 100}], x] (* _Vincenzo Librandi_, Jan 22 2017 *)

%o (Magma) m:=100; R<x>:=PowerSeriesRing(Integers(), m); Coefficients(R! 1/((1-x^2)*(1-x^3)*(1-x^9)*(1-x^11))); // _Vincenzo Librandi_, Jan 22 2017

%o (PARI) Vec(1/((1-x^2)*(1-x^3)*(1-x^9)*(1-x^11)) + O(x^60)) \\ _Michel Marcus_, Jan 22 2017

%K nonn,easy

%O 0,7

%A _N. J. A. Sloane_