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Search: id:A096986
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| A096986 |
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Numbers n such that n*n! + (smallest prime > n) is prime. |
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+0
3
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| 1, 2, 3, 4, 5, 6, 7, 8, 23, 29, 30, 31, 40, 164, 176, 189, 218, 370, 597, 603, 1473, 1901, 2176
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Note that Maple, Pari etc. have different notions of what "next prime" means!
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EXAMPLE
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8 is in the sequence because 8*8!+ 11 is prime.
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MATHEMATICA
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<< NumberTheory`NumberTheoryFunctions`; v={}; Do[If[PrimeQ [n*n!+NextPrime[n]], v=Append[v, n]; Print[v]], {n, 2400}]
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CROSSREFS
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Cf. A096985, A090704, A049433, A108270
Adjacent sequences: A096983 A096984 A096985 this_sequence A096987 A096988 A096989
Sequence in context: A037343 A134942 A053408 this_sequence A031097 A024651 A004848
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KEYWORD
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more,nonn
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AUTHOR
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Farideh Firoozbakht (f.firoozbakht(AT)math.ui.ac.ir), Jul 31 2004
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