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constructible polygon  and  iban n.

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First numbers that belong to both sets:

3, 4, 10, 12, 17, 20, 24, 40, 102, 120, 170, 204, 240, 272, 320, 340, 771, 1020, 1024, 2040, 2720, 3072, 4112, 7710, 10240, 41120.