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A068603
Numbers n such that prime(n)+prime(2n)+prime(3n) is prime.
1
2, 3, 12, 14, 17, 18, 19, 27, 29, 30, 31, 33, 34, 35, 36, 41, 43, 48, 49, 56, 57, 63, 66, 71, 77, 78, 79, 80, 92, 95, 102, 106, 108, 109, 113, 116, 118, 121, 125, 130, 134, 141, 142, 146, 147, 158, 162, 164, 168, 179, 182, 184, 187, 190, 194, 201, 204, 209, 211, 214
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[225], PrimeQ[Prime[#]+Prime[2#]+Prime[3#]]&] (* Harvey P. Dale, Jan 16 2011 *)
CROSSREFS
Sequence in context: A024579 A291565 A299545 * A045878 A295398 A138321
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Mar 28 2002
STATUS
approved