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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See also A086172, A086173, A086174, A086175, A086177.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

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

Cf. A086172, A086173, A086174, A086175, A086177.

Sequence in context: A155220 A300018 A268221 * A015789 A145021 A135280

Adjacent sequences:  A086173 A086174 A086175 * A086177 A086178 A086179

KEYWORD

easy,nonn

AUTHOR

Zak Seidov, Jul 11 2003

STATUS

approved

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Last modified November 19 00:12 EST 2019. Contains 329310 sequences. (Running on oeis4.)