A new conjecture ...
With n >1 and (a, m, n, b) ∈ ?, does there always exist n such that ...?
Summation of n elements of the series (a_1, a_2, a_3 ... a_n) not necessarily consecutive.
n = 2 - Pythagorean triple: (a_1)^2 + (a_2)^2 = b^2
n = 3 - Cubic Quatern: (a_1)^3 + (a_2)^3 + (a_3)^3 = b^3
n = ?