A200728 - OEIS

%I #17 Jun 27 2023 05:12:35

%S 2,0,0,2,6,0,2,4,7,3,4,4,9,6,5,2,6,2,9,9,5,1,7,0,5,6,4,2,1,4,2,2,3,3,

%T 8,7,1,2,7,3,6,9,8,7,9,4,9,0,7,8,5,3,0,0,3,4,6,7,2,9,8,3,8,0,3,8,4,8,

%U 3,2,5,5,5,7,9,9,0,7,7,6,4,1,3,2,4,0

%N Decimal expansion of the circumradius of cyclic quadrilateral with sides 1, 2, 3, 4.

%C Area is K = sqrt(24) = 4.89897948556635619639... (decimal expansion in A010480).

%H Zak Seidov, <a href="/A200728/a200728.png">Figure showing polygon</a>.

%F R = (385/96)^(1/2).

%e 2.0026024734496526299517...

%t RealDigits[Sqrt[385/96], 10, 120][[1]] (* _Amiram Eldar_, Jun 27 2023 *)

%o (PARI) sqrt(385/96) \\ _Charles R Greathouse IV_, Dec 28 2011

%Y Cf. A090654, A010480, A200113, A200257.

%K nonn,easy,cons

%O 1,1

%A _Zak Seidov_, Nov 21 2011