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The sum of the first n cubed numbers is the square of the nth triangular number.
The sum of the first n cubed numbers is: [n*(n+1)/2]2 which is the same as the square of the sum of the first n numbers.
A number can't be cubed and prime. Cubed numbers (other than 1) have more than two factors.
Cubed is the third dimension because it is a cube. A cube has three dimensions of equal amount. A cube of three-inch sides, to get its volume you'd multiply three times three times three, which is three cubed.
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