%I A094180
%S A094180 1,2,3,5,6,7,8,11,12,15,16,17,18,20,21,25,26,27,32,33,35,37,38,41,42,43,
%T A094180 45,48,50,52,53,56,57,58,60,61,63,66,68,70,71,77,78,83,86,87,90,91,92,
%U A094180 95,96,97,100,105,106,108,110,111,116,117,120,121,122,123,125,126,131
%N A094180 Numbers n such that 4n-1 is divisible only by primes of form 4m-1 (i.e. 
               by the Gaussian primes A002145).
%o A094180 (PARI) {for(n=1,140,fac=factor(4*n-1);v=vector(matsize(fac)[1],j,fac[j,
               1])%4;if(vecmin(v)==3,print1(n,",")))}
%Y A094180 For the actual numbers 4n-1, see A094179.
%Y A094180 Sequence in context: A161873 A080220 A028778 this_sequence A116545 A140661 
               A063966
%Y A094180 Adjacent sequences: A094177 A094178 A094179 this_sequence A094181 A094182 
               A094183
%K A094180 nonn
%O A094180 1,2
%A A094180 Lekraj Beedassy (blekraj(AT)yahoo.com), May 06 2004
%E A094180 More terms and PARI code from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), 
               May 08 2004