OFFSET
1,1
COMMENTS
Subsequence of A168219.
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
EXAMPLE
10*3^3+1 = 271 is prime, so prime 3 is in the sequence.
10*313^3+1 = 306642971 is prime, so prime 313 is in the sequence.
MATHEMATICA
Select[Prime[Range[100]], PrimeQ[10*#^3 + 1] &] (* G. C. Greubel, Jul 16 2016 *)
PROG
(Magma) [ p: p in PrimesUpTo(5000) | IsPrime(10*p^3+1) ]; // Vincenzo Librandi, Jan 29 2011
(PARI) select(p->isprime(10*p^3+1), primes(1000)) \\ Charles R Greathouse IV, Jul 16 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Eva-Maria Zschorn (e-m.zschorn(AT)zaschendorf.km3.de), Nov 22 2009
EXTENSIONS
Edited by Charles R Greathouse IV, Apr 24 2010
STATUS
approved