A170936 Decimal expansion of Re(tan(1+i)).

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

Offset

0,1

References

L. V. Ahlfors, Complex Analysis, McGraw-Hill, 3rd ed., p. 44.

Links

Table of n, a(n) for n=0..98.

Formula

Equals sin(2)/(cos(2) + cosh(2)). - Peter Luschny, Apr 23 2024

Example

.27175258531951171652884372249858892070946411146177945309808...

Mathematica

First[RealDigits[Re[Tan[1 + I]], 10, 100]] (* Paolo Xausa, Apr 23 2024 *)

Prog

(PARI) real(tan(1+I)) \\ Charles R Greathouse IV, Mar 25 2014

Crossrefs

Cf. A170937.

Sequence in context: A156194 A271855 A021372 * A111714 A368617 A060302

Adjacent sequences: A170933 A170934 A170935 * A170937 A170938 A170939

Keyword

nonn,cons

Author

N. J. A. Sloane, Feb 12 2010

Status

approved