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A086176
Numbers n such that n*prime(n)+3 is prime.
7
1, 4, 10, 20, 22, 28, 34, 38, 46, 56, 62, 92, 98, 112, 146, 148, 154, 166, 170, 176, 178, 200, 208, 254, 256, 260, 262, 266, 284, 340, 346, 352, 364, 394, 406, 412, 418, 460, 476, 500, 514, 524, 548, 550, 560, 574, 584, 586, 590, 610, 614, 620, 656, 664, 698
OFFSET
1,2
COMMENTS
LINKS
MATHEMATICA
Select[Range[1000], PrimeQ[ # Prime[ # ]+3]&]
PROG
(Magma) [n: n in [1..800] | IsPrime(n*NthPrime(n) + 3)]; // Vincenzo Librandi, Oct 05 2012
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zak Seidov, Jul 11 2003
STATUS
approved