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Search: id:A023258
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A023258 Numbers n such that n remains prime through 2 iterations of function f(x) = 6x + 7. +0
1
5, 17, 29, 37, 89, 127, 199, 229, 269, 347, 359, 379, 397, 499, 769, 809, 929, 947, 977, 1049, 1087, 1129, 1277, 1279, 1367, 1409, 1439, 1489, 1499, 1607, 1609, 1787, 2017, 2039, 2089, 2399, 2539, 2707, 2819, 2837, 2957, 3089, 3109, 3217, 3229, 3389, 3499 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A068829 A090403 A096705 this_sequence A030554 A017581 A068230

Adjacent sequences: A023255 A023256 A023257 this_sequence A023259 A023260 A023261

KEYWORD

nonn

AUTHOR

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

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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