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Search: id:A139204
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| A139204 |
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Numbers k such that (k!-9)/9 is prime. |
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+0
2
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| 6, 15, 17, 18, 21, 27, 29, 30, 37, 47, 50, 64, 125
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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a = {}; Do[If[PrimeQ[(n! - 9)/9], Print[a]; AppendTo[a, n]], {n, 1, 300}]; a (*Artur Jasinski*)
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CROSSREFS
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Cf. A139189, A139190, A139191, A139192, A139193, A139194, A139195, A139196, A139197, A139198.
Adjacent sequences: A139201 A139202 A139203 this_sequence A139205 A139206 A139207
Sequence in context: A128512 A009579 A114812 this_sequence A122661 A133481 A099535
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KEYWORD
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hard,more,nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Apr 11 2008
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