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A198752 Decimal expansion of the least x>0 that gives the absolute minimum of f(x)+f(2x)+f(3x)+f(4x)+f(5x), where f(x)=sin(x)-cos(x). 3
6, 0, 6, 9, 5, 0, 0, 3, 9, 3, 9, 6, 7, 0, 1, 1, 0, 2, 9, 2, 9, 3, 5, 7, 6, 2, 5, 3, 8, 5, 7, 0, 4, 5, 4, 2, 3, 8, 2, 3, 1, 7, 3, 5, 9, 9, 5, 5, 3, 8, 8, 9, 6, 1, 9, 4, 8, 0, 3, 1, 2, 1, 8, 0, 4, 9, 2, 7, 4, 6, 8, 9, 2, 5, 9, 6, 9, 2, 3, 5, 2, 9, 8, 8, 5, 8, 3, 4, 4, 7, 9, 4, 1, 8, 3, 5, 3, 0, 0, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A198745 for a guide to related sequences.

LINKS

Table of n, a(n) for n=1..100.

EXAMPLE

x=6.069500393967011029293576253857045423823...

min=-6.682126364889810370734279330610851580...

MATHEMATICA

f[t_] := Sin[t] - Cos[t]

n = 5; s[t_] := Sum[f[k*t], {k, 1, n}]

x = N[Minimize[s[t], t], 110]; u = Part[x, 1]

v = t /. Part[x, 2]

RealDigits[u] (* A198751 *)

RealDigits[v] (* A198752 *)

Plot[s[t], {t, -2 Pi, 2 Pi}, PlotRange -> {-7, 4.5}]

CROSSREFS

Cf. A198745.

Sequence in context: A004016 A093577 A065442 * A141462 A055955 A165071

Adjacent sequences:  A198749 A198750 A198751 * A198753 A198754 A198755

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Oct 29 2011

STATUS

approved

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Last modified November 28 20:50 EST 2020. Contains 338755 sequences. (Running on oeis4.)