OFFSET
3,1
COMMENTS
Gelfond's constant squared.
The proportionate distance between images of an object (e.g., galaxy) seen behind a nonrotating (Schwarzschild) black hole, see Sneppen link. The factor is reduced for rotating (Kerr) black holes. - Charles R Greathouse IV, Oct 17 2021
LINKS
Albert Sneppen, Divergent reflections around the photon sphere of a black hole, Scientific Reports 11, 14247 (2021).
FORMULA
Equals A039661^2.
Equals (i^i)^(-4).
EXAMPLE
535.4916555247647365030493295890471814778057976032949155072052550373...
MATHEMATICA
RealDigits[E^(2*Pi), 10, 105][[1]] (* T. D. Noe, Sep 17 2012 *)
PROG
(PARI) exp(2*Pi) \\ Charles R Greathouse IV, May 14 2019
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
John W. Nicholson, Sep 16 2012
STATUS
approved