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A143205 Numbers having exactly two distinct prime factors p, q with q=p+6. +0
2
55, 91, 187, 247, 275, 391, 605, 637, 667, 1147, 1183, 1375, 1591, 1927, 2057, 2491, 3025, 3127, 3179, 3211, 4087, 4459, 4693, 4891, 5767, 6647, 6655, 6875, 7387, 8281, 8993, 9991, 10807, 11227, 12091, 15125, 15341, 15379, 17947, 19343, 22627, 23707 (list; graph; listen)
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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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