login
This site is supported by donations to The OEIS Foundation.

 

Logo

The October issue of the Notices of the Amer. Math. Soc. has an article about the OEIS.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A094887 Decimal expansion of phi*sqrt(2), where phi = (1+sqrt(5))/2. 1
2, 2, 8, 8, 2, 4, 5, 6, 1, 1, 2, 7, 0, 7, 3, 7, 1, 9, 0, 4, 0, 0, 2, 9, 1, 1, 3, 4, 3, 2, 1, 2, 0, 8, 3, 0, 6, 1, 4, 4, 6, 1, 3, 5, 0, 7, 3, 5, 1, 0, 8, 2, 4, 5, 0, 0, 1, 7, 0, 9, 2, 2, 9, 5, 3, 9, 1, 6, 6, 3, 4, 5, 8, 5, 5, 0, 6, 7, 2, 6, 3, 0, 0, 9, 7, 3, 1, 7, 8, 2, 1, 3, 5, 3, 4, 7, 0, 9, 3 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

An algebraic number with minimal polynomial x^4 - 6x^2 + 4. - Charles R Greathouse IV, Mar 25 2014

The rhombus with diagonals phi*sqrt(2) and sqrt(2) is the unique golden rhombus -- by definition, the ratio of the diagonals of a golden rhombus is phi -- whose area is also phi (the golden ratio). - Rick L. Shepherd, Apr 10 2017

LINKS

Ivan Panchenko, Table of n, a(n) for n = 1..1000

MathWorld, Golden Rhombus

EXAMPLE

2.28824561127073719...

MATHEMATICA

RealDigits[GoldenRatio Sqrt[2], 10, 120][[1]] (* Harvey P. Dale, Jan 24 2016 *)

PROG

(PARI) sqrt(3+sqrt(5)) \\ Charles R Greathouse IV, Mar 25 2014

CROSSREFS

Cf. A001622 (phi), A002193 (sqrt(2)).

Sequence in context: A269545 A258983 A195138 * A021441 A196066 A260825

Adjacent sequences:  A094884 A094885 A094886 * A094888 A094889 A094890

KEYWORD

cons,nonn

AUTHOR

N. J. A. Sloane, Jun 15 2004

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 25 01:17 EDT 2018. Contains 315360 sequences. (Running on oeis4.)