A198821 - OEIS

A198821

Decimal expansion of x>0 satisfying x^2-2*cos(x)=1.

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

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OFFSET

1,2

COMMENTS

See A198755 for a guide to related sequences. The Mathematica program includes a graph.

LINKS

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

EXAMPLE

x=1.265423705869334955949569325755327056071832...

MATHEMATICA

a = 1; b = -2; c = 1;

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