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A124983
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Nonprime numbers == 1 mod 4 with a unique partition as a sum of 2 squares x^2+y^2.
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3
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1, 9, 45, 49, 81, 117, 121, 153, 245, 261, 333, 361, 369, 405, 441, 477, 529, 549, 605, 637, 657, 729, 801, 833, 873, 909, 961, 981, 1017
(list; graph; refs; listen; history; internal format)
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