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 A170938 4^n+2^n+2. 1

%I

%S 4,8,22,74,274,1058,4162,16514,65794,262658,1049602,4196354,16781314,

%T 67117058,268451842,1073774594,4295032834,17180000258,68719738882,

%U 274878431234,1099512676354,4398048608258,17592190238722,70368752566274,281474993487874,1125899940397058

%N 4^n+2^n+2.

%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (7,-14,8).

%F a(n)= 7*a(n-1) -14*a(n-2) +8*a(n-3). G.f.: 2*(2-10*x+11*x^2)/((1-x) * (2*x-1) * (4*x-1)). [From _R. J. Mathar_, Feb 15 2010]

%t Table[4^n+2^n+2,{n,0,30}] (* or *) LinearRecurrence[{7,-14,8},{4,8,22},30] (* _Harvey P. Dale_, Jan 10 2013 *)

%K nonn,easy

%O 0,1

%A _N. J. A. Sloane_, Feb 13 2010

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Last modified February 28 23:19 EST 2020. Contains 332353 sequences. (Running on oeis4.)