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A023280
Primes that remain prime through 3 iterations of function f(x) = 3x + 10.
3
3, 19, 47, 149, 199, 233, 353, 563, 607, 709, 919, 1013, 1361, 1367, 1697, 1801, 1871, 2137, 2203, 2819, 2879, 2917, 3041, 3229, 3449, 3701, 3943, 4093, 4111, 4177, 4567, 4973, 5519, 5689, 5987, 6053, 6359, 6421, 6841, 7019, 7283, 8647, 8951, 9109, 9719
OFFSET
1,1
COMMENTS
Primes p such that 3*p+10, 9*p+40 and 27*p+130 are also primes. - Vincenzo Librandi, Aug 04 2010
LINKS
MATHEMATICA
Select[Prime[Range[1200]], AllTrue[Rest[NestList[3#+10&, #, 3]], PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Mar 22 2015 *)
PROG
(Magma) [n: n in [1..150000] | IsPrime(n) and IsPrime(3*n+10) and IsPrime(9*n+40) and IsPrime(27*n+130)] // Vincenzo Librandi, Aug 04 2010
CROSSREFS
Sequence in context: A201875 A063553 A099007 * A054697 A214883 A363697
KEYWORD
nonn
STATUS
approved