A138382 - OEIS

%I #8 Aug 03 2015 09:37:34

%S 1,-3,-1,-2,-4,12,4,8,16,-48,-16,-32,-64,192,64,128,256,-768,-256,

%T -512,-1024,3072,1024,2048,4096,-12288,-4096,-8192,-16384,49152,16384,

%U 32768,65536,-196608,-65536,-131072,-262144,786432,262144,524288,1048576,-3145728

%N First differences of A138380. Second differences of A138377.

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, -4).

%F a(n)=-4a(n-4).

%t Differences[LinearRecurrence[{0,0,0,-4},{0,1,3,2},60],2] (* _Harvey P. Dale_, Mar 19 2012 *)

%t LinearRecurrence[{0, 0, 0, -4},{1, -3, -1, -2},42] (* _Ray Chandler_, Aug 03 2015 *)

%K sign

%O 0,2

%A _Paul Curtz_, May 08 2008

%E Definition corrected by _R. J. Mathar_, May 09 2008

%E More terms from Harvey P. Dale, Mar 19 2012