%I #9 Jun 22 2013 16:05:58

%S 0,0,12,92,536,2872,14884,75924,384048,1933424,9706556,48650956,

%T 243609160,1219108776,6098732628,30503229188,152544843872,

%U 762810312928,3814309845100,19072324066620,95363944856184,476826697849880

%N 5^n-3^n-2n.

%H Vincenzo Librandi, <a href="/A120990/b120990.txt">Table of n, a(n) for n = 0..1000</a>

%F G.f.: 4*x^2*(3-7*x)/((1-x)^2*(1-5*x)*(1-3*x)) . - _Vincenzo Librandi_, Feb 23 2013

%t CoefficientList[Series[4 x^2 (3 - 7 x)/((1 - x)^2 (1 - 5 x)(1 - 3 x)), {x, 0, 30}], x] (* _Vincenzo Librandi_, Feb 23 2013 *)

%Y Cf. A074606, A005058.

%K nonn,easy

%O 0,3

%A _Mohammad K. Azarian_, Aug 19 2006