login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A323098 Decimal expansion of edge length of a regular pentagon with area 1. 0
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 (list; constant; graph; refs; listen; history; text; internal format)
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 22 22:24 EDT 2020. Contains 337291 sequences. (Running on oeis4.)