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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A115754 Decimal expansion of sqrt(3/2). 7
1, 2, 2, 4, 7, 4, 4, 8, 7, 1, 3, 9, 1, 5, 8, 9, 0, 4, 9, 0, 9, 8, 6, 4, 2, 0, 3, 7, 3, 5, 2, 9, 4, 5, 6, 9, 5, 9, 8, 2, 9, 7, 3, 7, 4, 0, 3, 2, 8, 3, 3, 5, 0, 6, 4, 2, 1, 6, 3, 4, 6, 2, 8, 3, 6, 2, 5, 4, 8, 0, 1, 8, 8, 7, 2, 8, 6, 5, 7, 5, 1, 3, 2, 6, 9, 9, 2, 9, 7, 1, 6, 5, 5, 2, 3, 2, 0, 1, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Coordinate of a control point for a degree-5 integration formula for 7 points over the unit circle. [Stroud & Secrest]

Also real and imaginary part of sqrt(-3i). - Alonso del Arte, Dec 11 2012

Area of the quadrilateral obtained when slicing a unit cube with a plane passing through opposite vertices and the middle of opposite edges. See CNRS link. - Michel Marcus, Mar 26 2016

LINKS

Table of n, a(n) for n=1..99.

Ana Rechtman, Mars 2016, 3e défi, Images des Mathématiques, CNRS, 2016.

A. H. Stroud, D. Secrest, Approximate integration formulas for certain spherically symmetric regions, Math. Comp. 17 (82) (1963) 105

FORMULA

Two times A187110.

Equals Sum_{k>=0} binomial(1/2, k)/2^k. [Bruno Berselli, Sep 11 2015]

EXAMPLE

1.2247448713915890490986420373529456959829737403283350642163...

MATHEMATICA

RealDigits[Sqrt[3/2], 10, 105][[1]] (* Alonso del Arte, Dec 11 2012 *)

CROSSREFS

Sequence in context: A120280 A212362 A209142 * A210600 A220308 A203975

Adjacent sequences:  A115751 A115752 A115753 * A115755 A115756 A115757

KEYWORD

nonn,cons

AUTHOR

Eric Desbiaux, Jul 30 2008

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 July 25 18:14 EDT 2017. Contains 289796 sequences.