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A139348 Decimal expansion of negated cotangent of the golden ratio. That is, the decimal expansion of -cot((1+sqrt(5))/2). 6
0, 4, 7, 2, 7, 2, 8, 2, 8, 6, 6, 4, 7, 9, 4, 4, 8, 1, 1, 8, 9, 3, 5, 6, 5, 0, 9, 6, 0, 6, 2, 1, 6, 3, 3, 4, 2, 0, 0, 5, 6, 1, 0, 5, 7, 2, 2, 5, 5, 6, 5, 3, 3, 0, 9, 7, 7, 2, 9, 9, 2, 5, 3, 2, 4, 7, 9, 8, 7, 7, 2, 2, 1, 4, 5, 2, 5, 6, 8, 8, 1, 6, 8, 7, 9, 8, 8, 7, 5, 0, 5, 2, 9, 9, 3, 8, 8, 0, 7, 0, 2, 1, 5, 3 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
By the Lindemann-Weierstrass theorem, this constant is transcendental. - Charles R Greathouse IV, May 13 2019
LINKS
FORMULA
Equals cot(A001622).
From Amiram Eldar, Feb 07 2022: (Start)
Equals 1/A139347.
Equals A139346/A139345. (End)
EXAMPLE
0.04727282866479448118935650960621633420056105722556...
MATHEMATICA
Join[{0}, RealDigits[-Cot[GoldenRatio], 10, 120][[1]]] (* Harvey P. Dale, Sep 18 2013 *)
PROG
(PARI) -cotan((sqrt(5)+1)/2) \\ Charles R Greathouse IV, May 13 2019
CROSSREFS
Sequence in context: A246433 A324273 A308883 * A021683 A248179 A362753
KEYWORD
nonn,cons
AUTHOR
Mohammad K. Azarian, Apr 15 2008
EXTENSIONS
Added sign in definition. Leading zero dropped by R. J. Mathar, Feb 05 2009
STATUS
approved

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Last modified March 29 03:51 EDT 2024. Contains 371264 sequences. (Running on oeis4.)