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A023299
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Numbers n such that n remains prime through 3 iterations of function f(x) = 9x + 10.
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0
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11, 43, 83, 103, 281, 293, 641, 823, 937, 1069, 1489, 1733, 2237, 2251, 2521, 2539, 2647, 2671, 3361, 3529, 3919, 4129, 4759, 5531, 5867, 6101, 6299, 7417, 7669, 7853, 7951, 8443, 8737, 9547, 10597, 12041, 12641, 12821, 14813, 15083, 15091, 15413
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| n, 9*n+10, 81*n+100 and 729*n+910 are primes. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
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PROG
| (MAGMA) [n: n in [1..450000] | IsPrime(n) and IsPrime(9*n+10) and IsPrime(81*n+100) and IsPrime(729*n+910)] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
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CROSSREFS
| Sequence in context: A155711 A141195 A139853 * A031904 A022279 A141086
Adjacent sequences: A023296 A023297 A023298 * A023300 A023301 A023302
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KEYWORD
| nonn
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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