OFFSET
3,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 3..1002
Eric Weisstein's World of Mathematics, Power Tower.
Wikipedia, Tetration.
EXAMPLE
-277.441320354061791058569551395984751488030915...
MATHEMATICA
f[x_] := -ProductLog[-Log[x]]/Log[x]; RealDigits[Derivative[6][f][1/2], 10, 120][[1]] (* Amiram Eldar, May 23 2023 *)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Alois P. Heinz, Oct 19 2016
STATUS
approved