%I #7 Sep 27 2020 01:52:11
%S 2,96,328704,156581756928,16988273098107125760
%N Volume of the dual signed Birkhoff polytope C(n).
%H Florian Kohl, McCabe Olsen, and Raman Sanyal, <a href="https://arxiv.org/abs/1906.01469">Unconditional reflexive polytopes</a>, arXiv:1906.01469 [math.CO], 2019. Also Discrete and Computational Geom., 64:2 (2020), 427-452.
%Y Cf. A337650, A337651, A337652.
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_, Sep 26 2020