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 A008772 Expansion of (1+x^11)/(1-x)/(1-x^2)/(1-x^3)/(1-x^4). 1

%I

%S 1,1,2,3,5,6,9,11,15,18,23,28,35,41,50,59,70,81,95,109,126,143,163,

%T 184,208,232,260,289,321,354,391,429,471,514,561,610,663,717,776,837,

%U 902,969,1041,1115,1194,1275

%N Expansion of (1+x^11)/(1-x)/(1-x^2)/(1-x^3)/(1-x^4).

%H Vincenzo Librandi, <a href="/A008772/b008772.txt">Table of n, a(n) for n = 0..2000</a>

%H <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (2, -1, 1, -1, -1, 1, -1, 2, -1).

%F G.f.: (1+x^11)/(1-x)/(1-x^2)/(1-x^3)/(1-x^4).

%t CoefficientList[Series[(1 + x^11)/(1 - x)/(1 - x^2)/(1 - x^3)/(1 - x^4), {x, 0, 50}], x] (* _Wesley Ivan Hurt_, Apr 08 2017 *)

%t Join[{1, 1}, LinearRecurrence[{2, -1, 1, -1, -1, 1, -1, 2, -1}, {2, 3, 5, 6, 9, 11, 15, 18, 23}, 30]] (* _Vincenzo Librandi_, Apr 09 2017 *)

%o (PARI) Vec((1+x^11)/(1-x)/(1-x^2)/(1-x^3)/(1-x^4) + O(x^60)) \\ _Michel Marcus_, Apr 08 2017

%K nonn

%O 0,3

%A _N. J. A. Sloane_

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Last modified February 15 16:25 EST 2019. Contains 320136 sequences. (Running on oeis4.)