2,1

By the Lindemann-Weierstrass theorem, this constant is transcendental. - Charles R Greathouse IV, May 13 2019

Table of n, a(n) for n=2..106.

Index entries for transcendental numbers

tan(A001622) = -21.153801...

(PARI) -tan((sqrt(5)+1)/2) \\ Charles R Greathouse IV, May 13 2019

Cf. A001622, A094214, A104457, A098317, A002390, A139339, A139340, A139341, A139342, A139345, A139346.

Sequence in context: A232187 A076241 A316399 * A288620 A263324 A284949

Adjacent sequences: A139344 A139345 A139346 * A139348 A139349 A139350

nonn,cons

Mohammad K. Azarian, Apr 15 2008

Offset corrected by Mohammad K. Azarian, Dec 13 2008

Added sign in definition R. J. Mathar, Feb 05 2009

approved