A195721 - OEIS

A195721

Decimal expansion of arctan(sqrt(1/6)).

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

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OFFSET

0,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..10000

FORMULA

Equals arcsin(sqrt(1/7)) = arccos(sqrt(6/7)). - Amiram Eldar, Jul 06 2023

EXAMPLE

arctan(sqrt(1/6)) = 0.387596686655180...

MATHEMATICA

RealDigits[ArcTan[Sqrt[1/6]], 10, 120][[1]] (* Harvey P. Dale, Nov 09 2011 *)

PROG