login
A165947
Primes of the form 2q + 3 where q is composite.
1
11, 19, 23, 31, 43, 47, 53, 59, 67, 71, 73, 79, 83, 101, 103, 107, 113, 127, 131, 139, 151, 157, 163, 167, 173, 179, 191, 193, 199, 211, 223, 227, 233, 239, 241, 251, 263, 269, 271, 283, 293, 307, 311, 313, 331, 347, 353, 359, 367, 373, 379, 383, 409, 419, 421
OFFSET
1,1
LINKS
FORMULA
A000040 \ { {2,3,5} U A089531}. - R. J. Mathar, Oct 28 2009
MATHEMATICA
Select[Table[If[PrimeQ[n], 0, 2n+3], {n, 2, 500}], PrimeQ] (* Harvey P. Dale, Mar 25 2011 *)
PROG
(PARI) lista(nn) = forcomposite(q=4, nn, if(isprime(p=2*q+3), print1(p, ", "))); \\ Altug Alkan, Apr 18 2016
CROSSREFS
Sequence in context: A246428 A121658 A320867 * A129517 A287061 A359401
KEYWORD
nonn,easy
AUTHOR
Claudio Meller, Oct 01 2009
STATUS
approved