digit/number: first Foias' constant; the unique value of x_{1} such that x_{n}
-> ∞ as n -> ∞ for x_{n+1 }= (1 + (1/( x_{n )))^n}; such x_{1} = 1.187…

See also: fu'a'au

- fu'a'au
*(exp!)* - digit/number: second Foias constant; the value x for which (1/x)(1 + (1/x))
^{x}=1 is true; ≈ 2.293…