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A005099
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(( Primes = -1 mod 4 ) + 1)/4.
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4
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1, 2, 3, 5, 6, 8, 11, 12, 15, 17, 18, 20, 21, 26, 27, 32, 33, 35, 38, 41, 42, 45, 48, 50, 53, 56, 57, 60, 63, 66, 68, 71, 77, 78, 83, 87, 90, 92, 95, 96, 105, 108, 110, 111, 116, 117, 120, 122, 123, 125, 126, 131, 137, 141, 143, 147, 150, 152, 155, 158, 161, 162, 165
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(n) = (A002145(n)+1)/4. - R. J. Mathar, Jun 07 2011
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MATHEMATICA
| lst={}; Do[p=4*n-1; If[PrimeQ[p], AppendTo[lst, n]], {n, 0, 10^3}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 10 2008]
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PROG
| (MAGMA) [ (p+1)/4: p in PrimesUpTo(700) | p mod 4 eq 3 ]; [From Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Dec 22 2008]
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CROSSREFS
| Sequence in context: A028767 A138529 A035057 * A161720 A105760 A050834
Adjacent sequences: A005096 A005097 A005098 * A005100 A005101 A005102
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Dec 22 2008
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