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A188728 Continued fraction of (e+sqrt(16+e^2))/4. 2

%I #10 Sep 08 2022 08:45:56

%S 1,1,7,1,46,8,30,1,5,4,2,6,3,2,5,1,1,1,3,50,1,3,1,1,3,1,45,1,1,1,4,1,

%T 1,2,8,2,35,2,1,27,6,112,1,113,16,1,11,1,1,6,1,12,1,3,2,15,1,2,1,1,5,

%U 1,16,2,2,2,1,10,1,43,1,13,1,6,1,4,1,2,1,1,1,6,1,8,8,1,6,3,3,17,3,1,27,1,11,1,1,1,1,1,1,9,7,2,1,5,5,7,6,2,1,5,1,2,1,5,57,8,2,1

%N Continued fraction of (e+sqrt(16+e^2))/4.

%C See A188727 for the origin of the constant.

%H G. C. Greubel, <a href="/A188728/b188728.txt">Table of n, a(n) for n = 1..10000</a>

%F [1,1,7,1,46,30,1,5,4,...]= (e+sqrt(16+e^2))/4.

%t r = e/2; t = (r + (4 + r^2)^(1/2))/2; FullSimplify[t]

%t N[t, 130]

%t RealDigits[N[t, 130]][[1]] (* A188727 *)

%t ContinuedFraction[t, 120] (* A188728 *)

%o (PARI) default(realprecision, 100); contfrac((exp(1) + sqrt(16 + exp(2)))/4) \\ _G. C. Greubel_, Oct 31 2018

%o (Magma) SetDefaultRealField(RealField(100)); ContinuedFraction((Exp(1) + Sqrt(16 + Exp(2)))/4); // _G. C. Greubel_, Oct 31 2018

%Y Cf. A188640, A188727.

%K nonn,cofr

%O 1,3

%A _Clark Kimberling_, Apr 10 2011

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