login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A200369 Decimal expansion of least x>0 satisfying 2*x^2+3*x+4=tan(x). 2
1, 4, 9, 3, 6, 8, 9, 3, 5, 7, 9, 7, 4, 3, 7, 2, 9, 4, 2, 9, 7, 8, 1, 6, 9, 6, 9, 5, 4, 7, 3, 7, 3, 3, 0, 2, 8, 3, 3, 2, 1, 0, 1, 0, 6, 2, 8, 0, 2, 3, 8, 1, 5, 0, 7, 2, 6, 6, 9, 8, 5, 6, 1, 1, 3, 6, 3, 0, 5, 5, 7, 0, 0, 7, 5, 9, 0, 0, 0, 0, 3, 2, 7, 3, 3, 4, 5, 8, 7, 5, 1, 7, 4, 5, 6, 4, 6, 1, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A200338 for a guide to related sequences.  The Mathematica program includes a graph.

LINKS

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

EXAMPLE

x=1.49368935797437294297816969547373302833210106280...

MATHEMATICA

a = 2; b = 3; c = 4;

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

Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]

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

RealDigits[r]   (* A200369 *)

CROSSREFS

Cf. A200338.

Sequence in context: A199178 A318331 A198828 * A226094 A292340 A329218

Adjacent sequences:  A200366 A200367 A200368 * A200370 A200371 A200372

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Nov 17 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 December 3 11:13 EST 2021. Contains 349462 sequences. (Running on oeis4.)