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A198544 Decimal expansion of x<0 having 4*x^2+4x=sin(x). 2
7, 7, 4, 2, 3, 8, 8, 9, 1, 7, 5, 6, 3, 9, 1, 3, 2, 0, 4, 2, 7, 4, 0, 3, 6, 1, 9, 7, 3, 8, 5, 0, 9, 3, 9, 9, 3, 2, 0, 8, 8, 6, 1, 1, 0, 9, 8, 1, 0, 8, 1, 4, 8, 9, 0, 6, 8, 0, 1, 2, 5, 5, 7, 6, 9, 8, 7, 1, 4, 3, 7, 7, 8, 1, 0, 5, 7, 8, 5, 6, 8, 6, 1, 0, 1, 0, 1, 1, 6, 4, 2, 2, 6, 5, 1, 8, 6, 6, 9 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

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

LINKS

Table of n, a(n) for n=0..98.

EXAMPLE

x=-0.77423889175639132042740361973850...

MATHEMATICA

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

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

Plot[{f[x], g[x]}, {x, -1, .42}]

r = x /. FindRoot[f[x] == g[x], {x, -.8, -.7}, WorkingPrecision -> 110]

RealDigits[r] (* A198544 *)

CROSSREFS

Cf. A198414.

Sequence in context: A221566 A064619 A265306 * A247274 A086315 A185577

Adjacent sequences:  A198541 A198542 A198543 * A198545 A198546 A198547

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Oct 26 2011

STATUS

approved

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Last modified February 28 11:05 EST 2020. Contains 332323 sequences. (Running on oeis4.)