This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A200728 #19 Nov 26 2024 13:09:46 %S A200728 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 A200728 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 A200728 3,2,5,5,5,7,9,9,0,7,7,6,4,1,3,2,4,0 %N A200728 Decimal expansion of the circumradius of cyclic quadrilateral with sides 1, 2, 3, 4. %C A200728 Area is K = sqrt(24) = 4.89897948556635619639... (decimal expansion in A010480). %H A200728 Zak Seidov, <a href="/A200728/a200728.png">Figure showing polygon</a>. %H A200728 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a> %F A200728 R = (385/96)^(1/2). %e A200728 2.0026024734496526299517... %t A200728 RealDigits[Sqrt[385/96], 10, 120][[1]] (* _Amiram Eldar_, Jun 27 2023 *) %o A200728 (PARI) sqrt(385/96) \\ _Charles R Greathouse IV_, Dec 28 2011 %Y A200728 Cf. A090654, A010480, A200113, A200257. %K A200728 nonn,easy,cons %O A200728 1,1 %A A200728 _Zak Seidov_, Nov 21 2011