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A165222 a(n) = (2^(n+4)+1)*(2^n+1). 0

%I

%S 34,99,325,1161,4369,16929,66625,264321,1052929,4203009,16794625,

%T 67143681,268505089,1073881089,4295245825,17180426241,68720590849,

%U 274880135169,1099516084225,4398055424001,17592203870209,70368779829249

%N a(n) = (2^(n+4)+1)*(2^n+1).

%F a(n) = 7*a(n-1) -14*a(n-2)+8*a(n-3). G.f.: (34-139*x+108*x^2)/((1-x)*(2*x-1)*(4*x-1)). - R. J. Mathar, Sep 20 2009

%F a(n) = A000051(n) * A000051(n+4). - _Michel Marcus_, Jul 17 2013

%o (PARI) a(n) = (2^(n+4)+1)*(2^n+1) \\ _Michel Marcus_, Jul 17 2013

%K nonn,easy

%O 0,1

%A Boris Hostnik (megpplus(AT)siol.net), Sep 08 2009

%E Two initial fractional values removed by _R. J. Mathar_, Sep 20 2009

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Last modified November 15 13:56 EST 2019. Contains 329149 sequences. (Running on oeis4.)