Find the next number in the following series:
6, 14, 26, 98, __?

The next number will be 276.

6 = 1^1 + 2^1 + 3^1
14 = 1^2 + 2^2 + 3^2
36 = 1^3 + 2^3 + 3^3
98 = 1^4 + 2^4 + 3^4
276 = 1^5 + 2^5 + 3^5