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A023272 Numbers n such that n remains prime through 3 iterations of function f(x) = 2x + 1. +0
32
2, 5, 89, 179, 359, 509, 1229, 1409, 2699, 3539, 6449, 10589, 11549, 11909, 12119, 17159, 19709, 19889, 22349, 26189, 27479, 30389, 43649, 53639, 53849, 55229, 57839, 60149, 61409, 63419, 66749, 71399, 74699, 75329, 82499, 87539, 98369, 101399 (list; graph; listen)
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Last modified December 9 14:43 EST 2009. Contains 170430 sequences.


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