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A016105 Blum numbers: of form P*Q where P&Q are distinct primes congruent to 3 (mod 4). +0
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21, 33, 57, 69, 77, 93, 129, 133, 141, 161, 177, 201, 209, 213, 217, 237, 249, 253, 301, 309, 321, 329, 341, 381, 393, 413, 417, 437, 453, 469, 473, 489, 497, 501, 517, 537, 553, 573, 581, 589, 597, 633, 649, 669, 681, 713, 717, 721, 737, 749, 753, 781, 789 (list; graph; listen)
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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.


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