OFFSET
1,1
LINKS
John Cerkan, Table of n, a(n) for n = 1..10000
FORMULA
a(n) == 1 (mod 6) for n>=2. - John Cerkan, Sep 07 2016
MAPLE
A023205:=n->`if`(isprime(n) and isprime(2*n+5), n, NULL): seq(A023205(n), n=1..3*10^3); # Wesley Ivan Hurt, Sep 08 2016
MATHEMATICA
Select[Prime@Range@250, PrimeQ[2#+5]&] (* Vladimir Joseph Stephan Orlovsky, Apr 25 2011 *)
PROG
(Magma) [n: n in [0..100000] | IsPrime(n) and IsPrime(2*n+5)] // Vincenzo Librandi, Aug 04 2010
CROSSREFS
KEYWORD
nonn
AUTHOR
David W. Wilson, Jun 14 1998
STATUS
approved