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a(n)=-a(n-1)+2a(n-3).
1

%I #6 Jul 31 2015 21:25:01

%S 0,1,-3,3,-1,-5,11,-13,3,19,-45,51,-13,-77,179,-205,51,307,-717,819,

%T -205,-1229,2867,-3277,819,4915,-11469,13107,-3277,-19661,45875,

%U -52429,13107,78643,-183501,209715,-52429,-314573,734003,-838861,209715,1258291

%N a(n)=-a(n-1)+2a(n-3).

%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (-1, 0, 2).

%F G.f.: (2*x^2-x)/(2*x^3-x-1). - _Harvey P. Dale_, Dec 03 2012

%t LinearRecurrence[{-1,0,2},{0,1,-3},80] (* _Harvey P. Dale_, Dec 03 2012 *)

%K sign

%O 0,3

%A _Paul Curtz_, Apr 17 2008

%E More terms from _Harvey P. Dale_, Dec 03 2012