0,2

This sequence is also decimal expansion of cotangent of 87 degrees. - Mohammad K. Azarian, Jun 29 2013

An algebraic integer of degree 8. - Charles R Greathouse IV, Aug 27 2017

Ivan Panchenko, Table of n, a(n) for n = 0..1000

Wikipedia, Exact trigonometric constants

0.0524077...

(PARI) tan(Pi/60) \\ Charles R Greathouse IV, Aug 27 2017

Sequence in context: A307381 A256167 A207528 * A187059 A267120 A267484

Adjacent sequences: A019898 A019899 A019900 * A019902 A019903 A019904

nonn,cons

N. J. A. Sloane.

Zero added in front by R. J. Mathar, Feb 05 2009

approved