%I A005099
%S A005099 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,
%T A005099 56,57,60,63,66,68,71,77,78,83,87,90,92,95,96,105,108,110,111,116,117,
%U A005099 120,122,123,125,126,131,137,141,143,147,150,152,155,158,161,162,165
%N A005099 (( Primes = -1 mod 4 ) + 1)/4.
%t A005099 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]
%o A005099 (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]
%Y A005099 Sequence in context: A028767 A138529 A035057 this_sequence A161720 A105760 
               A050834
%Y A005099 Adjacent sequences: A005096 A005097 A005098 this_sequence A005100 A005101 
               A005102
%K A005099 nonn
%O A005099 1,2
%A A005099 N. J. A. Sloane (njas(AT)research.att.com).
%E A005099 More terms from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Dec 
               22 2008