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A131608 Period 24: repeat 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, -1, -1, -3, -7, -7, -1, -9, -9, -7, -3, -3, -9. 0

%I #8 Oct 13 2022 12:44:04

%S 1,1,3,7,7,1,9,9,7,3,3,9,-1,-1,-3,-7,-7,-1,-9,-9,-7,-3,-3,-9,1,1,3,7,

%T 7,1,9,9,7,3,3,9,-1,-1,-3,-7,-7,-1,-9,-9,-7,-3,-3,-9,1,1,3,7,7,1,9,9,

%U 7,3,3,9,-1,-1,-3,-7,-7,-1,-9,-9,-7,-3,-3,-9,1,1,3,7,7,1,9,9,7,3,3,9,-1,-1,-3,-7,-7,-1,-9,-9,-7,-3,-3,-9

%N Period 24: repeat 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, -1, -1, -3, -7, -7, -1, -9, -9, -7, -3, -3, -9.

%H <a href="/index/Rec#order_12">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,0,0,0,0,0,0,0,-1).

%F a(n)= -a(n-12).

%F G.f. (1+x)*(1+x+x^2)*(x^2-x+1)*(9*x^6-6*x^5+4*x^3+2*x^2+1) / ( (1+x^4)*(x^8-x^4+1) ). - R. J. Mathar, Oct 08 2011

%t PadRight[{},100,{1,1,3,7,7,1,9,9,7,3,3,9,-1,-1,-3,-7,-7,-1,-9,-9,-7,-3,-3,-9}] (* _Harvey P. Dale_, Jun 09 2015 *)

%K sign,easy

%O 0,3

%A _Paul Curtz_, Oct 02 2007

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)