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constructible polygon  and  sphenic n.

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(max 15 digits)

First numbers that belong to both sets:

30, 102, 170, 255, 1542, 2570, 3855, 8738, 13107, 21845, 393222, 655370, 983055, 2228258, 3342387, 5570645, 33686018, 50529027, 84215045.