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Search: id:A023247
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A023247 Numbers n such that n remains prime through 2 iterations of function f(x) = 3x + 4. +0
1
3, 5, 23, 59, 73, 79, 109, 179, 269, 373, 383, 389, 409, 439, 509, 599, 683, 709, 929, 983, 1019, 1129, 1193, 1409, 1423, 1453, 1663, 1699, 1879, 2039, 2053, 2069, 2579, 2753, 2963, 3049, 3169, 3203, 3259, 3719, 3769, 3833, 4799, 4973, 4993, 5303, 5443, 5483 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A120937 A075307 A100302 this_sequence A027753 A066411 A153410

Adjacent sequences: A023244 A023245 A023246 this_sequence A023248 A023249 A023250

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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