cp's OEIS Frontend

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.

A356030 Decimal expansion of the real root of x^3 - x - 2.

This page as a plain text file.
%I A356030 #16 Jun 18 2023 01:52:17
%S A356030 1,5,2,1,3,7,9,7,0,6,8,0,4,5,6,7,5,6,9,6,0,4,0,8,0,8,3,2,2,5,4,4,3,8,
%T A356030 5,1,4,4,2,8,3,8,9,8,2,8,4,2,7,9,0,3,9,0,9,0,9,0,4,9,8,0,1,5,4,2,8,1,
%U A356030 5,6,4,0,3,4,3,0,5,8,8,2,1,6,0,4,9,1,6,3,7,9,2,6,9,6,7,3,3,8,7,7,0,5,6,7,9
%N A356030 Decimal expansion of the real root of x^3 - x - 2.
%F A356030 Equals ((27 + 3*sqrt(78))^(1/3) + 3/(27 + 3*sqrt(78))^(1/3))/3.
%F A356030 Equals (1 + sqrt(78)/9)^(1/3) + (1 - sqrt(78)/9)^(1/3).
%e A356030 1.5213797068045675696040808322544385144283898284279039090904980154281564...
%t A356030 RealDigits[x /. FindRoot[x^3 - x - 2, {x, 2}, WorkingPrecision -> 120]][[1]] (* _Amiram Eldar_, Jun 18 2023 *)
%o A356030 (PARI) solve(x=1, 2, x^3 - x - 2) \\ _Michel Marcus_, Aug 19 2022
%Y A356030 Cf. A289265, A356031.
%K A356030 nonn,cons,easy
%O A356030 1,2
%A A356030 _Wolfdieter Lang_, Aug 19 2022