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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A086201 Decimal expansion of 1/(2*Pi). 27
1, 5, 9, 1, 5, 4, 9, 4, 3, 0, 9, 1, 8, 9, 5, 3, 3, 5, 7, 6, 8, 8, 8, 3, 7, 6, 3, 3, 7, 2, 5, 1, 4, 3, 6, 2, 0, 3, 4, 4, 5, 9, 6, 4, 5, 7, 4, 0, 4, 5, 6, 4, 4, 8, 7, 4, 7, 6, 6, 7, 3, 4, 4, 0, 5, 8, 8, 9, 6, 7, 9, 7, 6, 3, 4, 2, 2, 6, 5, 3, 5, 0, 9, 0, 1, 1, 3, 8, 0, 2, 7, 6, 6, 2, 5, 3, 0, 8, 5, 9, 5, 6 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

If a single hump of cycloid, with arc length 8*radius (generating circle), is inside a rectangle with width=2*radius and length=2*Pi*radius, then the radius must be 1/(2*Pi) (this sequence) to have (2/Pi), A060294, as semi arc of cycloid (arc = 4/Pi = A088538) and the rectangle... length=1, width=1/Pi. I suppose that in 3D geometry, gliding along a cycloid, in all directions around, from a point A at the height of 1/Pi, gives Pi*point B. - Eric Desbiaux, Dec 21 2008

Radius of circle having circumference 1. - Clark Kimberling, Jan 06 2014

LINKS

Table of n, a(n) for n=0..101.

Eric Weisstein's World of Mathematics, Plouffe's Constants

Eric Weisstein's World of Mathematics, Pythagorean Triple

EXAMPLE

0.15915...

MATHEMATICA

RealDigits[N[1/(2*Pi), 6! ]][[1]] (* Vladimir Joseph Stephan Orlovsky, Jun 18 2009 *)

CROSSREFS

Sequence in context: A127414 A186192 A231532 * A010490 A021173 A266553

Adjacent sequences:  A086198 A086199 A086200 * A086202 A086203 A086204

KEYWORD

nonn,cons

AUTHOR

Eric W. Weisstein, Jul 12 2003

EXTENSIONS

Link corrected by Fred Daniel Kline, Jul 29 2015

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 May 24 18:18 EDT 2017. Contains 286997 sequences.