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A023268 Numbers n such that n remains prime through 2 iterations of function f(x) = 9x + 10. +0
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11, 13, 43, 47, 67, 83, 89, 103, 109, 193, 197, 251, 281, 293, 383, 397, 449, 461, 601, 617, 641, 733, 757, 823, 839, 853, 887, 937, 967, 1013, 1069, 1091, 1447, 1489, 1733, 1741, 1789, 1931, 2111, 2237, 2239, 2251, 2339, 2521, 2539, 2647, 2671, 2693, 2797 (list; graph; listen)
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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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