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Search: id:A023266
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A023266 Numbers n such that n remains prime through 2 iterations of function f(x) = 9x + 4. +0
1
3, 7, 31, 37, 41, 71, 73, 83, 107, 191, 283, 307, 317, 337, 373, 421, 631, 743, 773, 821, 857, 883, 967, 1283, 1297, 1361, 1451, 1567, 1571, 1637, 1823, 1973, 2137, 2207, 2351, 2417, 2677, 2683, 2837, 3011, 3083, 3271, 3331, 3517, 3571, 3691, 3727, 3793, 3877 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A053648 A138862 A080173 this_sequence A110581 A128436 A034915

Adjacent sequences: A023263 A023264 A023265 this_sequence A023267 A023268 A023269

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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