

A191934


Numbers n such that the imaginary quadratic number field Q(sqrt(n)) has 2class group of type (2,2,2).


0



420, 660, 1092, 1155, 1380, 1428, 1540, 1995, 2415, 2660, 2820, 2964, 3003, 3135, 3255, 3444, 3540, 3876, 3927, 4004, 4692, 4836
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..22.
E. Benjamin, F. Lemmermeyer, C. Snyder, Imaginary quadratic fields with Cl_2(k) isomorphic to (2,2,2), J. Number Theory, 103 (2003), 3870.


CROSSREFS

Sequence in context: A070237 A305416 A156687 * A147775 A169825 A135196
Adjacent sequences: A191931 A191932 A191933 * A191935 A191936 A191937


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane, Jun 19 2011


STATUS

approved



