System of Sums Of Powers

Algebra Level 3

Given the following system of equations:

x+y+z=1x2+y2+z2=2x3+y3+z3=3,\begin{aligned} x + y + z &= 1\\ x^{2} + y^{2} + z^{2} &= 2\\ x^{3} + y^{3} + z^{3} &= 3, \end{aligned}

find the smallest positive integer value of n (>3)n ~(> 3) such that xn+yn+znx^{n} + y^{n} + z^{n} is an integer.

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