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Search: id:A120311
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| A120311 |
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Numbers whose PrimePi prime distribution are four apart and which index primes of the 4*k+3 type. |
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+0
1
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| 8, 9, 19, 20, 22, 38, 39, 54, 56, 58, 72, 90, 91, 92, 93, 94, 95, 96, 107, 131, 132, 133, 153, 154, 155, 156, 173, 175, 177, 193, 195
(list; graph; listen)
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OFFSET
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0,1
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FORMULA
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a(n) = If[Mod[PrimePi[n], 4] == 0&& Mod[Prime[n], 4] - 3 == 0, n]
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MATHEMATICA
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a = Flatten[Table[If[Mod[PrimePi[n], 4] == 0&& Mod[Prime[n], 4] -3 == 0, n, {}], {n, 1, 200}]]
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CROSSREFS
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Sequence in context: A069809 A067544 A022313 this_sequence A061414 A071869 A048124
Adjacent sequences: A120308 A120309 A120310 this_sequence A120312 A120313 A120314
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KEYWORD
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nonn,uned
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Jun 20 2006
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EXTENSIONS
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Needs to be edited in the same way that I edited A120309. - N. J. A. Sloane (njas(AT)research.att.com), Jul 22 2006
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