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A165811
Primes of the form 18*p+1, where p is also a prime.
2
37, 127, 199, 307, 523, 739, 1063, 1279, 1423, 1747, 2287, 2467, 2503, 2683, 2719, 3259, 3547, 3583, 4339, 4519, 4987, 5059, 5527, 6067, 6247, 6607, 6823, 7219, 7759, 8623, 8839, 9739, 10243, 10567, 11863, 12619, 12763, 13627, 14347, 14563, 14779, 14887
OFFSET
1,1
LINKS
FORMULA
a(n) = 1+18*A165810(n).
EXAMPLE
p=2 contributes 37=18*2+1. p=7 contributes 127=18*7+1. p=11 contributes 199=18*11+1
MATHEMATICA
Select[Table[18p + 1, {p, Prime[Range[400]]}], PrimeQ] (* Vincenzo Librandi, Oct 13 2012 *)
PROG
(Magma) [a: p in PrimesInInterval(2, 1000) | IsPrime(a) where a is 18*p + 1]; // Vincenzo Librandi, Oct 13 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Sep 28 2009
EXTENSIONS
Extended by R. J. Mathar, Oct 16 2009
STATUS
approved