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A139446 Numbers n such that primorial(n)/2 - 32 is prime. 5
4, 5, 6, 8, 10, 12, 23, 38, 50, 65, 67, 95, 100, 108, 114, 281, 835, 894, 1103, 3442, 6629 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(22) > 25,000. - Robert Price, Jan 02 2017
LINKS
MATHEMATICA
k = 1; a = {}; Do[k = k*Prime[n]; If[PrimeQ[k - 32] && k>32, Print[n]; AppendTo[a, n]], {n, 2, 325}]; a
CROSSREFS
Sequence in context: A226746 A206416 A144043 * A274918 A277736 A287358
KEYWORD
nonn
AUTHOR
Artur Jasinski, Apr 21 2008
EXTENSIONS
Drop 2,3 and correct program, a(17)-a(19) from Ray Chandler, Jun 16 2013
a(20)-a(21) from Robert Price, Jan 02 2017
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)