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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A198822 Decimal expansion of x>0 satisfying x^2-2*cos(x)=2. 2
1, 4, 7, 8, 1, 7, 0, 2, 6, 6, 4, 3, 0, 3, 2, 1, 2, 8, 3, 3, 1, 0, 6, 2, 4, 1, 7, 5, 3, 4, 7, 7, 4, 6, 8, 0, 8, 0, 2, 6, 8, 2, 3, 5, 1, 7, 8, 0, 1, 5, 1, 4, 9, 2, 9, 9, 3, 1, 3, 6, 1, 2, 7, 1, 5, 4, 6, 5, 6, 9, 3, 0, 9, 7, 6, 7, 0, 9, 5, 1, 8, 9, 1, 9, 8, 7, 5, 2, 2, 1, 3, 6, 5, 6, 9, 6, 9, 0, 3 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A198755 for a guide to related sequences.  The Mathematica program includes a graph.

LINKS

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

EXAMPLE

x=1.47817026643032128331062417534774680802682351780...

MATHEMATICA

a = 1; b = -2; c = 2;

f[x_] := a*x^2 + b*Cos[x]; g[x_] := c

Plot[{f[x], g[x]}, {x, -3, 3}, {AxesOrigin -> {0, 0}}]

r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]

RealDigits[r] (* A198822 *)

CROSSREFS

Cf. A198755.

Sequence in context: A305740 A171548 A296565 * A275977 A151968 A115632

Adjacent sequences:  A198819 A198820 A198821 * A198823 A198824 A198825

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Oct 30 2011

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 October 23 14:45 EDT 2019. Contains 328345 sequences. (Running on oeis4.)