A170937 Decimal expansion of Im(tan(1+I)).

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

Offset

1,3

References

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

Links

Table of n, a(n) for n=1..99.

Formula

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

Example

1.0839233273386945434757520612119717213449675274753898563197...

Mathematica

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

Prog

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

Crossrefs

Cf. A170936.

Sequence in context: A166202 A146482 A019938 * A058265 A357528 A135005

Adjacent sequences: A170934 A170935 A170936 * A170938 A170939 A170940

Keyword

nonn,cons

Author

N. J. A. Sloane, Feb 12 2010

Status

approved