HowWhat is known about how to divide {1,4,9,16,...,81^2}$\{1,4,9,16,...,81^2\}$ into 3$3$ equal-sum subsets with 27$27$ elements per subset. If there any method to find this partitions?
Grammar. Put the exponentiation into math-mode instead of text-mode. Added relevant tags.
Peter Heinig
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