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Search: id:A139441
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| A139441 |
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Numbers n such that primorial(n)/2 + 8 is prime. |
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+0
24
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| 2, 3, 4, 5, 9, 11, 12, 18, 24, 29, 38, 76, 146, 152, 187, 200, 404
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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k = 1; a = {}; Do[k = k*Prime[n]; If[PrimeQ[k + 8], Print[n]; AppendTo[a, n]], {n, 2, 404}]; a (*Artur Jasinski*)
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CROSSREFS
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Cf. A067026, A067027, A139439, A139440, A139441, A139442, A139443, A139444, A139445, A139446, A139447, A139448, A139449, A139450, A139451, A139452, A139453, A139454, A139455, A139456, A139457, A103514.
Adjacent sequences: A139438 A139439 A139440 this_sequence A139442 A139443 A139444
Sequence in context: A062096 A143827 A100797 this_sequence A093305 A065817 A084542
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Apr 21 2008
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