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!)
A198423 Decimal expansion of x>0 having x^2-x=4*sin(x). 1
2, 2, 9, 8, 8, 5, 3, 5, 8, 2, 2, 7, 7, 4, 0, 3, 2, 9, 5, 2, 0, 6, 0, 5, 9, 1, 9, 6, 1, 5, 3, 4, 3, 3, 3, 5, 0, 8, 7, 3, 9, 3, 2, 2, 5, 2, 2, 3, 1, 3, 2, 3, 3, 0, 8, 3, 4, 5, 5, 7, 6, 0, 3, 5, 8, 5, 5, 5, 9, 6, 2, 5, 4, 0, 0, 2, 4, 3, 9, 7, 6, 8, 9, 5, 0, 6, 4, 7, 0, 4, 2, 0, 0, 8, 4, 0, 7, 6, 7 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A198414 for a guide to related sequences.  The Mathematica program includes a graph.

LINKS

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

EXAMPLE

x=2.2988535822774032952060591961534333...

MATHEMATICA

a = 1; b = -1; c = 4;

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

Plot[{f[x], g[x]}, {x, -1, 2.5}]

r = x /. FindRoot[f[x] == g[x], {x, 2.29, 2.3}, WorkingPrecision -> 110]

RealDigits[r] (* A198423 *)

CROSSREFS

Cf. A198414.

Sequence in context: A220265 A243597 A021439 * A229116 A346918 A203904

Adjacent sequences:  A198420 A198421 A198422 * A198424 A198425 A198426

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Oct 25 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 16:20 EDT 2021. Contains 348215 sequences. (Running on oeis4.)