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First differences of A074323.
1

%I #10 Jan 16 2017 03:24:00

%S 0,2,-1,4,-2,8,-4,16,-8,32,-16,64,-32,128,-64,256,-128,512,-256,1024,

%T -512,2048,-1024,4096,-2048,8192,-4096,16384,-8192,32768,-16384,65536,

%U -32768,131072,-65536,262144,-131072,524288,-262144,1048576,-524288

%N First differences of A074323.

%H Matthew House, <a href="/A137206/b137206.txt">Table of n, a(n) for n = 0..6605</a>

%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (0,2).

%F From _R. J. Mathar_, Apr 22 2009: (Start)

%F G.f.: x*(2-x)/(1-2*x^2).

%F a(n) = (-1)^(n+1)*A135530(n-1). (End)

%F a(n) = 2*a(n-2). - _Matthew House_, Jan 15 2017

%Y Cf. A000079, A131577, A135530.

%K sign

%O 0,2

%A _Paul Curtz_, Mar 05 2008

%E More terms from _R. J. Mathar_, Apr 22 2009