(1⁵ + 2⁵) + (1⁷ + 2⁷) = 2 (1 + 2)⁴

(1⁵ + 2⁵ + 3⁵) + (1⁷ + 2⁷ + 3⁷) = 2 (1 + 2 + 3)⁴

(1⁵ + 2⁵ + 3⁵ + 4⁵) + (1⁷ + 2⁷ + 3⁷ + 4⁷) = 2 (1 + 2 + 3 + 4)⁴

(1⁵ + 2⁵ + 3⁵ + 4⁵ + 5⁵) + (1⁷ + 2⁷ + 3⁷ + 4⁷ + 5⁷) = 2 (1 + 2 + 3 + 4 + 5)⁴

…