OFFSET
1,3
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..5000
Kunle Adegoke, Infinite arctangent sums involving Fibonacci and Lucas numbers, arXiv:1603.08097 [math.NT], 2016.
FORMULA
EXAMPLE
arccos(sqrt(1/6)) = 1.150261991510931...
MATHEMATICA
r = Sqrt[1/6]; RealDigits[ArcCos[r], 10, 100][[1]]
PROG
(PARI) atan(sqrt(5)) \\ Michel Marcus, Mar 29 2016
(Magma) [Arccos(Sqrt(1/6))]; // G. C. Greubel, Nov 23 2017
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 23 2011
STATUS
approved