The Super Power Numbers

Definition: A positive number is said to be super power when it is the power of at least two different positive integers.

The first few ones are: 1, 16, 64, 81, 256, 512, ...

16 = 4^2 = 2^4, 64 = 8^2 = 4^3, 81 = 9^2 = 3^4, etc.

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