Fractional part of 30^(1/3) = 1/10 + 1/139 + 1/26137 + ... Generated with Perl's Math::BigFloat module. Number of digits in terms is as follows: 2, 3, 5, 9, 18, 36, 72, 144, 288, ...
EXAMPLE
Cube root of 30 = 3.1072325059538588668776624275223863628549068290674...