Order of certain group related to alternating sign matrices.

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%I

%S 1,1,1,1,2,210,263340

%N Order of certain group related to alternating sign matrices.

%H Benjamin Wieland, Large Dihedral Symmetry of the Set of Alternating Sign Matrices, <a href="http://www.combinatorics.org">Electronic J. Combinatorics</a>, #R37, 2000.