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A066025 Numbers n such that GCD(Sigma(n), Sigma(n+1)) > n. +0
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5, 12, 14, 70, 88, 125, 180, 204, 206, 220, 957, 1253, 1334, 1364, 1634, 1673, 1750, 1888, 1919, 2685, 2759, 2958, 2974, 3127, 4364, 5191, 7615, 8142, 8632, 9114, 11219, 12000, 12035, 14664, 14841, 18414, 18762, 18873, 19358, 20118 (list; graph; listen)
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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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