1,1

Also the decimal expansion of cotangent of 6 degrees. - Ivan Panchenko, Sep 01 2014

Ivan Panchenko, Table of n, a(n) for n = 1..1000

Wikipedia, Exact trigonometric constants

Sequence in context: A019881 A049256 A256191 * A198421 A262178 A154483

Adjacent sequences: A019979 A019980 A019981 * A019983 A019984 A019985

nonn,cons

N. J. A. Sloane.

approved