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Search: id:A023250
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A023250 Numbers n such that n remains prime through 2 iterations of function f(x) = 4x + 3. +0
1
2, 7, 11, 37, 67, 89, 109, 149, 179, 257, 439, 467, 571, 677, 691, 719, 929, 977, 1019, 1279, 1381, 1447, 1549, 1567, 1747, 1787, 1901, 1931, 2111, 2161, 2207, 2287, 2347, 2377, 2459, 2539, 2671, 2711, 2819, 3119, 3229, 3371, 3491, 3607, 3637, 3821, 3877 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A026133 A026162 A025189 this_sequence A106013 A073623 A101592

Adjacent sequences: A023247 A023248 A023249 this_sequence A023251 A023252 A023253

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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