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%I #15 Dec 08 2016 04:26:26
%S 420,660,1092,1155,1380,1428,1540,1995,2415,2660,2820,2964,3003,3135,
%T 3255,3444,3540,3876,3927,4004,4692,4836
%N Numbers n such that the imaginary quadratic number field Q(sqrt(-n)) has 2-class group of type (2,2,2).
%H E. Benjamin, F. Lemmermeyer, C. Snyder, <a href="http://dx.doi.org/10.1016/S0022-314X(03)00084-2">Imaginary quadratic fields with Cl_2(k) isomorphic to (2,2,2)</a>, J. Number Theory, 103 (2003), 38-70.
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_, Jun 19 2011
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