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A151894
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Numbers n such that n! + second prime after n! is prime.
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3
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2, 3, 5, 6, 7, 8, 11, 17, 42, 66, 76, 93, 139, 157
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Because numebrs of the form: (n! + prime) are divisable by all primes <= n that mean that first prime number can have form n! + next prime after n! and no primes of the form n! + k for k > 1 and k < next prime after n!
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MATHEMATICA
| a = {}; Do[If[PrimeQ[n! + NextPrime[n!, 2]], AppendTo[a, n]], {n, 1, 200]; a (*Artur Jasinski*)
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CROSSREFS
| Cf. A002981, A151892, A151893, A151903.
Sequence in context: A016741 A191167 A006431 * A028229 A104452 A062877
Adjacent sequences: A151891 A151892 A151893 * A151895 A151896 A151897
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KEYWORD
| nonn
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Apr 12 2008
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