Answer:
140737488355328
Explanation:
Formula
L_n = a*r^(n-1)
Givens
a = 2
4
Solution
L_24 = 2*4^(24 -1)
L_24 = 2 * 70368744177664
Note the only way I know that you can get this answer is to use the calculator that came with windows. I don't think even my programing language would get it.
L_24 = 140737488355328