%I
%S 1,3,21,160,1620,19068,264420,4166880,74011488,1459381440,31674232128
%N Column 2 of triangle in A189507.
%H Simona Grusea and Anthony Labarre, <a href="http://arxiv.org/abs/1104.3353">The distribution of cycles in breakpoint graphs of signed permutations</a>, arXiv:1104.3353v1
%Y Cf. A189507.
%K nonn,more
%O 1,2
%A _N. J. A. Sloane_, Apr 23 2011
%E Added missing term for n=9, _Anthony Labarre_, Feb 14 2013
