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Search: id:A092057
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| A092057 |
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Primes of the form 2*prime(n)^2-1. |
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+0
5
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| 7, 17, 97, 241, 337, 577, 3361, 3697, 6961, 10657, 23761, 25537, 32257, 37537, 49297, 64081, 65521, 77617, 79201, 89041, 126001, 138337, 153457, 171697, 193441, 249217, 269377, 287281, 334561, 351121, 374977, 474337, 633937, 652081, 665857
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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lst={}; Do[p=Prime[n]; If[PrimeQ[r=2*p^2-1], AppendTo[lst, r]], {n, 6!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jun 20 2009]
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PROGRAM
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(PARI) for (i=1, 300, if(isprime(2*prime(i)^2-1), print1(2*prime(i)^2-1, ", ")))
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CROSSREFS
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Cf. A092058.
Sequence in context: A123206 A035078 A124165 this_sequence A082738 A092340 A068172
Adjacent sequences: A092054 A092055 A092056 this_sequence A092058 A092059 A092060
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KEYWORD
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easy,nonn
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AUTHOR
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mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Feb 19 2004
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