A198670 - OEIS

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A198670

Decimal expansion of the least x>0 that gives the absolute minimum of cos(x)+cos(2x)+cos(3x).

1, 2, 9, 2, 9, 4, 3, 0, 5, 8, 5, 0, 5, 4, 2, 6, 6, 6, 5, 2, 2, 5, 6, 3, 1, 1, 9, 5, 4, 6, 9, 1, 3, 5, 4, 8, 5, 4, 3, 4, 6, 2, 9, 7, 1, 5, 0, 0, 4, 7, 2, 3, 7, 7, 8, 6, 7, 0, 2, 1, 6, 2, 0, 7, 4, 3, 6, 7, 3, 2, 9, 0, 0, 6, 1, 7, 1, 9, 5, 6, 5, 8, 8, 0, 6, 2, 0, 1, 6, 0, 5, 4, 6, 1, 0, 7, 6, 4, 3

(list; constant; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

See A196361 for a guide to related sequences.

LINKS

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

EXAMPLE

x=1.2929430585054266652256311954691354...

min(f(x))=-1.3155651547204494123522707...

MATHEMATICA

n = 3; f[t_] := Cos[t]; s[t_] := Sum[f[k*t], {k, 1, n}];