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A199212 a(n) = 2*5^n+1. 1

%I #14 Sep 08 2022 08:46:00

%S 3,11,51,251,1251,6251,31251,156251,781251,3906251,19531251,97656251,

%T 488281251,2441406251,12207031251,61035156251,305175781251,

%U 1525878906251,7629394531251,38146972656251,190734863281251,953674316406251

%N a(n) = 2*5^n+1.

%H Vincenzo Librandi, <a href="/A199212/b199212.txt">Table of n, a(n) for n = 0..1000</a>

%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (6,-5).

%F a(n) = 5*a(n-1)-4.

%F a(n) = 6*a(n-1)-5*a(n-2).

%F G.f.: (3-7*x)/((1-x)*(1-5*x)). - _Bruno Berselli_, Nov 04 2011

%o (Magma) [2*5^n+1: n in [0..30]];

%K nonn,easy

%O 0,1

%A _Vincenzo Librandi_, Nov 04 2011

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Last modified March 28 07:48 EDT 2024. Contains 371235 sequences. (Running on oeis4.)