OFFSET
0,1
COMMENTS
Here, i is the imaginary unit sqrt(-1) and e is the Euler number.
For the real part of this constant, and for more comments, see A263208.
LINKS
Stanislav Sykora, Table of n, a(n) for n = 0..2000
FORMULA
Equals the imaginary part of (sqrt(e^2 + 4 * i) - e)/2.
EXAMPLE
0.355881727107562782631319498137529743468727927576648116645325368688...
MAPLE
evalf((16 + exp(4))^(1/4) * sin(arctan(4/exp(2))/2) / 2, 120); # Vaclav Kotesovec, Nov 06 2015
MATHEMATICA
RealDigits[Im[(Sqrt[E^2 + 4I] - E)/2], 10, 100][[1]] (* Alonso del Arte, Oct 12 2015 *)
PROG
(PARI) imag((-exp(1)+sqrt(exp(2)+4*I))/2)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Stanislav Sykora, Oct 12 2015
STATUS
approved