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Search: id:A157468
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| A157468 |
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Primes of the form : Sqrt[p-1]-1, p is a prime. |
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+0
2
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| 3, 5, 13, 19, 23, 53, 73, 83, 89, 109, 149, 179, 223, 229, 239, 263, 269, 283, 313, 349, 383, 419, 439, 443, 463, 569, 593, 643, 653, 673, 739, 859, 863, 919, 929, 1009, 1069, 1093, 1123, 1289, 1319, 1373, 1409, 1429, 1433, 1439, 1459
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Sqrt[17-1]-1=3(prime), Sqrt[37-1]-1=5(prime), ...
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MATHEMATICA
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lst={}; Do[p=Prime[n]; r=Sqrt[p-1]-1; If[PrimeQ[r], AppendTo[lst, r]], {n, 4*8!}]; lst
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CROSSREFS
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Cf. A127435, A127436, A157467
Sequence in context: A045413 A108702 A136053 this_sequence A157974 A019420 A019358
Adjacent sequences: A157465 A157466 A157467 this_sequence A157469 A157470 A157471
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Mar 01 2009
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