OFFSET
0,1
COMMENTS
LINKS
Eric Weisstein's World of Mathematics, Power Tower
FORMULA
c = arg(i^i^i^...).
EXAMPLE
0.6884532271077021304987675711768242596 ...
MATHEMATICA
2*I*ProductLog[-I*Pi/2]/Pi // Arg // N[#, 108]& // RealDigits[#][[1]]& (* Jean-François Alcover, Feb 05 2013 *)
PROG
(PARI) \\ start with I^(0.4+0.4*I) and iterate (%+I^%)/2. It converges pretty rapidly to z.
CROSSREFS
KEYWORD
AUTHOR
Stanislav Sykora, May 17 2012
STATUS
approved