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Unitary Sociable Numbers sociable numbers of order six.
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Note that the first 6 terms and the next 6 terms form two sociable groups. But then the 12 next 12 terms belong to two distinct sociable groups.
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Note that the first 6 terms and the next 6 terms form two sociable groups. But then the 12 next terms belong to two distinct sociable groups. - _David A. Corneth_, Oct 01 2018
Note that the first 6 terms and the next 6 terms form two sociable groups. But then the 12 next terms belong to two distinct sociable groups. - _David A. Corneth_, Oct 01 2018
If in a cycle at least 1 term is of the form 36k + 18 then a(25) > 5*10^9 - David A. Corneth, Oct 01 2018