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A023311
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Numbers n such that n remains prime through 4 iterations of function f(x) = 4x + 3.
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0
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1447, 2207, 6211, 6607, 8369, 9769, 11821, 13537, 13729, 13781, 15581, 17231, 17497, 27817, 32059, 32569, 32611, 33647, 36251, 39079, 46381, 47417, 55127, 55171, 57077, 60869, 63361, 64327, 68927, 77951, 81619, 85469, 86767, 88001, 94099, 94477, 96149
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| n, 4*n+3, 16*n+15, 64*n+63 and 256*n+255 are primes. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
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PROG
| (MAGMA) [n: n in [1..1000000] | IsPrime(n) and IsPrime(4*n+3) and IsPrime(16*n+15) and IsPrime(64*n+63) and IsPrime(256*n+255)] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
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CROSSREFS
| Sequence in context: A031626 A031754 A031536 * A045099 A122421 A187992
Adjacent sequences: A023308 A023309 A023310 * A023312 A023313 A023314
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KEYWORD
| nonn
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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