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A195694 Decimal expansion of arccos(-1/r), where r = (1+sqrt(5))/2 (the golden ratio). 4
2, 2, 3, 7, 0, 3, 5, 7, 5, 9, 2, 8, 7, 4, 1, 1, 8, 7, 4, 3, 3, 5, 3, 2, 6, 5, 8, 7, 6, 1, 7, 5, 4, 4, 1, 6, 2, 7, 6, 6, 0, 7, 4, 8, 3, 8, 4, 1, 3, 5, 0, 0, 7, 5, 3, 3, 1, 8, 9, 4, 6, 1, 3, 8, 9, 5, 7, 8, 8, 7, 1, 9, 2, 5, 2, 2, 1, 6, 3, 7, 8, 1, 0, 2, 1, 9, 2, 4, 2, 4, 3, 8, 4, 0, 6, 3, 9, 6, 6, 9 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Let c1 and c2 be the constants at A195692 and A195694; then c1+c2 = Pi.

LINKS

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

EXAMPLE

arccos(-1/r) = 2.2370357592874118743353265876175441...

MATHEMATICA

(See A195692.)

RealDigits[ArcCos[-1/GoldenRatio], 10, 120][[1]] (* Harvey P. Dale, Jan 15 2012 *)

CROSSREFS

Cf. A001622, A175288, A195692, A195693.

Sequence in context: A275487 A096100 A260161 * A021451 A210188 A183442

Adjacent sequences:  A195691 A195692 A195693 * A195695 A195696 A195697

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Sep 22 2011

STATUS

approved

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Last modified October 17 14:28 EDT 2019. Contains 328114 sequences. (Running on oeis4.)