Fractional part of 28^(1/3) = 1/28 + 1/1144 + 1/1784799 + ... Generated with Perl's Math::BigFloat module. Number of digits in terms is as follows: 2, 4, 7, 14, 27, 54, 108, 215, 430, ...
EXAMPLE
Cube root of 28 = 3.0365889718756625194208095785056696355814539772481...