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A139065
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Numbers k for which (7+k!)/7 is prime.
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43
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11, 15, 16, 25, 35, 59, 64, 68, 82, 121, 149, 238
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Primes of the form (7+k!)/7 see A139064
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MATHEMATICA
| a = {}; Do[If[PrimeQ[(n! + 7)/7], AppendTo[a, n]], {n, 1, 500}]; a
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PROG
| (PARI) for(k=7, 1e3, if(ispseudoprime(k!/7+1), print1(k", "))) \\ Charles R Greathouse IV, Jul 15 2011
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CROSSREFS
| Cf. A082672, A089085, A089130, A117141, A007749, A139056, A139057, A139058, A139059, A139060, A139061, A139061, A139062, A139063, A139064, A139065, A139066, A020458.
Sequence in context: A061087 A063964 A174952 * A186404 A111322 A069822
Adjacent sequences: A139062 A139063 A139064 * A139066 A139067 A139068
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KEYWORD
| nonn
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Apr 07 2008
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