login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A151924 Decimal expansion of first local maximum of x^2*sin(x). 0
2, 2, 8, 8, 9, 2, 9, 7, 2, 8, 1, 0, 3, 4, 0, 4, 3, 6, 4, 8, 2, 1, 4, 1, 4, 1, 7, 2, 1, 7, 3, 7, 2, 9, 6, 4, 3, 6, 2, 1, 3, 9, 3, 5, 3, 8, 0, 1, 8, 5, 6, 6, 6, 1, 4, 8, 2, 9, 0, 2, 3, 6, 3, 8, 1, 0, 4, 0, 4, 3, 4, 6, 8, 5, 6, 3, 9, 4, 4, 4, 1, 9, 2, 8, 3, 4, 2, 2, 0, 3, 2, 3, 0, 7, 9, 3, 9, 1, 9, 8, 7, 8, 6, 6, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
A solution to 2*tan(x) + x = 0. [R. J. Mathar, Aug 06 2009]
LINKS
EXAMPLE
2.288929728103405...
MAPLE
Digits := 120 ; x := 2.28 ; for it from 1 to 20 do x := x-(2*tan(x)+x)/(3+2*tan(x)^2) ; print(x) ; od: CONSTTOLIST(x) ; # R. J. Mathar, Aug 06 2009
MATHEMATICA
NMaximize[{x^2 Sin[x]}, {x}]
RealDigits[x/.FindRoot[2*Tan[x]==-x{x, 2.288929728103405}, WorkingPrecision->200]][[1]] (* Zak Seidov, Aug 06 2009 *)
PROG
(PARI) solve(x=2, 3, 2*tan(x)+x)
CROSSREFS
Sequence in context: A138102 A187791 A245235 * A346205 A343984 A268342
KEYWORD
nonn,cons
AUTHOR
Robert G. Wilson v, Aug 06 2009
EXTENSIONS
More digits from R. J. Mathar and Zak Seidov, Aug 06 2009
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 08:53 EDT 2024. Contains 371268 sequences. (Running on oeis4.)