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A098090
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Integers n such that 2*n-3 is prime.
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12
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3, 4, 5, 7, 8, 10, 11, 13, 16, 17, 20, 22, 23, 25, 28, 31, 32, 35, 37, 38, 41, 43, 46, 50, 52, 53, 55, 56, 58, 65, 67, 70, 71, 76, 77, 80, 83, 85, 88, 91, 92, 97, 98, 100, 101, 107, 113, 115, 116, 118, 121, 122, 127, 130, 133, 136, 137, 140, 142, 143, 148, 155, 157, 158
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Supersequence of A063908.
Left edge of the triangle in A065305. [Reinhard Zumkeller, Jan 30 2012]
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FORMULA
| Half of p+3 where p is a prime greater than 2.
A122845(a(n), 3) = 3; a(n) = A113935(n+1)/2. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 14 2006
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MATHEMATICA
| (Prime[Range[2, 100]]+3)/2 [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Feb 08 2010]
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PROG
| (MAGMA) [ n: n in [1..200] | IsPrime(2*n-3) ]; [From Vincenzo Librandi, Dec 26 2010]
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CROSSREFS
| Cf. A000040, A006254, A067076, A085090, A086801, A089192, A089253.
Sequence in context: A187911 A089230 A171512 * A174681 A026347 A187482
Adjacent sequences: A098087 A098088 A098089 * A098091 A098092 A098093
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KEYWORD
| nonn
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AUTHOR
| Douglas Winston (douglas.winston(AT)srupc.com), Sep 14 2004
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