OFFSET
1,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Lambert W-Function
Eric Weisstein's World of Mathematics, Pi
Wikipedia, Lambert W function
Wikipedia, Pi
FORMULA
Equals -(log(Pi)*Pi+LambertW(-1, -log(Pi)*exp(-log(Pi)*Pi)))/log(Pi).
EXAMPLE
1.30311436056414282237568004579571932219648879925328977038807684...
MAPLE
Digits:= 200:
evalf(-(log(Pi)*Pi+LambertW(-1, -log(Pi)*exp(-log(Pi)*Pi)))/log(Pi));
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Alois P. Heinz, Mar 14 2018
STATUS
approved