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Line 143: ==Uniqueness== The sequence of positive integers which have only one representation as a sum of four squares of ~~positive~~non-negative integers (up to order) is: :1, 2, 3, 5, 6, 7, 8, 11, 14, 15, 23, 24, 32, 56, 96, 128, 224, 384, 512, 896 ... {{OEIS\|A006431}}.

Lagrange's four-square theorem: Difference between revisions