A323098 Decimal expansion of edge length of a regular pentagon with area 1.

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

Offset

0,1

Links

Table of n, a(n) for n=0..86.

Formula

Equals sqrt(1/A102771) = 2/(25 + 10*sqrt(5))^(1/4).

Example

0.7623870555067738744984026821...

Mathematica

RealDigits[(2)/(25 + 10*Sqrt[5])^(1/4), 10, 100][[1]] (* Metin Sariyar, Oct 26 2019 *)

Prog

(PARI) default(realprecision, 110); 2/(25 + 10*sqrt(5))^(1/4)

Crossrefs

Cf. A102771, A154605 (the edge length of an equilateral triangle).

Sequence in context: A138096 A258010 A011102 * A068469 A276459 A181152

Adjacent sequences: A323095 A323096 A323097 * A323099 A323100 A323101

Keyword

cons,nonn

Author

Jinyuan Wang, Oct 26 2019

Status

approved