Search: id:A138109
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%I A138109
%S A138109 6,15,21,35,55,65,77,85,91,95,115,119,133,143,161,187,203,209,217,221,
%T A138109 247,253,259,287,299,301,319,323,329,341,377,391,403,407,437,451,473,
%U A138109 481,493,517,527,533,551,559,583,589,611,629,649,667,671,689,697,703
%N A138109 Positive integers n whose smallest prime factor is greater than the cube 
               root of n and strictly less than the square root of n.
%C A138109 This sequence was suggested by Moshe Newman
%e A138109 a(1)=6 because the smallest prime factor of 6 is 2 and 1.817...<2<2.449...
%t A138109 s = {}; Do[f = FactorInteger[i]; test = f[[1]][[1]]; If [test < N[i^(1/
               2)] && test > N[i^(1/3)], s = Union[s, {i}]], {i, 2, 2000}]; Print[s]
%Y A138109 Sequence in context: A009092 A015793 A063466 this_sequence A072521 A130178 
               A100410
%Y A138109 Adjacent sequences: A138106 A138107 A138108 this_sequence A138110 A138111 
               A138112
%K A138109 nonn
%O A138109 1,1
%A A138109 David S. Newman (davidsnewman(AT)gmail.com), May 04 2008

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