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!)
A198816 Decimal expansion of x>0 satisfying x^2-cos(x)=1. 2
1, 1, 7, 6, 5, 0, 1, 9, 3, 9, 9, 0, 1, 8, 3, 2, 4, 0, 0, 4, 4, 7, 3, 7, 7, 2, 6, 8, 7, 3, 1, 0, 4, 0, 9, 8, 6, 6, 2, 3, 7, 1, 2, 3, 5, 8, 9, 8, 1, 2, 9, 2, 4, 1, 4, 4, 2, 8, 6, 6, 0, 1, 8, 4, 9, 8, 5, 8, 6, 6, 3, 7, 4, 4, 1, 5, 1, 3, 5, 9, 0, 7, 3, 4, 3, 3, 0, 0, 4, 7, 1, 5, 7, 1, 5, 9, 2, 7, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,3

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=1.17650193990183240044737726873104098662371235...

MATHEMATICA

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

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, 1.1, 1.2}, WorkingPrecision -> 110]

RealDigits[r]  (* A198816 *)

CROSSREFS

Cf. A198755.

Sequence in context: A341328 A094961 A069814 * A196553 A244921 A334380

Adjacent sequences:  A198813 A198814 A198815 * A198817 A198818 A198819

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 May 6 14:16 EDT 2021. Contains 343586 sequences. (Running on oeis4.)