Dear Colleague,
Of course, the size of higher dihedral group must be larger.
But : gap> d2 := DihedralGroup(2); Size(d2); Group( (1,2), (3,4) ) 4 gap> d4 := DihedralGroup(4); Size(d4); Group( (1,2) ) 2 Is here a bug ?
Yours, R.M.