This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A198211 Decimal expansion of x>0 having 3*x^2=cos(x). 2
 5, 3, 5, 4, 2, 8, 2, 4, 4, 1, 6, 4, 6, 5, 6, 9, 1, 4, 1, 2, 5, 9, 7, 8, 6, 8, 5, 3, 0, 8, 3, 9, 7, 3, 8, 0, 8, 7, 9, 6, 8, 4, 4, 3, 9, 2, 2, 7, 5, 1, 4, 6, 3, 0, 1, 8, 7, 8, 4, 2, 0, 9, 8, 6, 7, 4, 8, 3, 8, 7, 7, 8, 4, 5, 6, 9, 7, 8, 4, 5, 0, 0, 9, 7, 5, 4, 8, 8, 0, 9, 7, 2, 8, 9, 1, 9, 4, 5, 7 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS See A197737 for a guide to related sequences.  The Mathematica program includes a graph. LINKS EXAMPLE x=0.535428244164656914125978685308397380... MATHEMATICA a = 3; b = 0; c = 1; f[x_] := a*x^2 + b*x; g[x_] := c*Cos[x] Plot[{f[x], g[x]}, {x, -1, 1}] r = x /. FindRoot[f[x] == g[x], {x, 0.53, 0.54}, WorkingPrecision -> 110] RealDigits[r] (* A198211 *) CROSSREFS Cf. A197737. Sequence in context: A112920 A109364 A122277 * A216707 A145439 A165096 Adjacent sequences:  A198208 A198209 A198210 * A198212 A198213 A198214 KEYWORD nonn,cons AUTHOR Clark Kimberling, Oct 22 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .