Curious sequence 153 Calculator

This tool solves the sum of the cubes of the digits: 2³ + 4³ = 8 + 64 = 72. This calculation is repeated by the new number: 7³ + 2³ = 343 + 8 = 351. Again: 3³ + 5³ + 1³ = 27 + 125 + 1 = 153. Again: 1³ + 5³ + 3³ = 1 + 125 + 27 =153. The sequence is then: 24, 72, 351, 153, 153. 

Enter Positive Integer:		(multiple of 3)