Search: id:A092205
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%I A092205
%S A092205 4,2,6,4,2,2,2,2,4,2,2,6,2,2,2,4,2,2,2,2,2,2,2,2,4,2,6,2,2,2,2,2,2,2,2,
%T A092205 4,2,2,2,2,2,2,2,2,2,2,2,6,4,2,2,2,2,2,2,2,2,2,2,2,2,2,2,4,2,2,2,2,2,2,
%U A092205 2,2,2,2,6,2,2,2,2,2,4,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,4,2,2
%N A092205 Number of units in the imaginary quadratic field Q[Sqrt[ -n]].
%C A092205 Sequence of n such that a(n)=2 gives A092206; a(n)=4 gives A000290; a(n)=6 
               gives A033428 - Marc LeBrun (mlb(AT)well.com), Apr 12 2006
%H A092205 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               Unit.html">Unit</a>
%e A092205 For n=1, the units are +/-1, +/-i.
%e A092205 For n=2, the units are +/-1, +/-w, +/-w^2, where w is a cube root of 
               unity.
%Y A092205 Cf. A092206, A000290, A033482.
%Y A092205 Sequence in context: A097362 A129131 A097467 this_sequence A059853 A136527 
               A138614
%Y A092205 Adjacent sequences: A092202 A092203 A092204 this_sequence A092206 A092207 
               A092208
%K A092205 nonn
%O A092205 1,1
%A A092205 Eric Weisstein (eric(AT)weisstein.com), Feb 24, 2004

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