%I A001051
%S A001051 1,3,1,5,1,5,1,7,1,5,1,8,1,5,1,7,1,5,1,7,1,5,1,10,1,5,1,7,1,5,1,7,1,5,
               1,7,
%T A001051 1,5,1,7,1,5,1,7,1,5,1,8,1,5,1,7,1,5,1,7,1,5,1,8,1,5,1,7,1,5,1,7,1,5,1,
               7,
%U A001051 1,5,1,7,1,5,1,7,1,5,1,7,1,5,1,7,1,5,1,7,1,5,1,7
%N A001051 Number of subgroups of order n in orthogonal group O(3).
%H A001051 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               OrthogonalGroup.html">Link to a section of The World of Mathematics.</
               a>
%F A001051 Has period 1 5 1 7 except that a(2) = 3, a(4) = 5, a(12) = 8, a(24) = 
               10, a(48) = a(60) = a(120) = 8.
%Y A001051 The main sequences concerned with group theory are A000001, A000679, 
               A001034, A001051, A001228, A005180, A000019, A000637, A000638, A002106, 
               A005432, A051881.
%Y A001051 Sequence in context: A056753 A154723 A114567 this_sequence A046730 A002972 
               A029652
%Y A001051 Adjacent sequences: A001048 A001049 A001050 this_sequence A001052 A001053 
               A001054
%K A001051 nonn,easy,nice
%O A001051 1,2
%A A001051 J. H. Conway, conway(AT)math.princeton.edu