n=1: labelled racks 1, isomorphism classes 1  (0.0s)
  B3-classes (= twist classes): 1; groups with >1 rack: 0, sizes []
  unordered twist pairs of non-isomorphic racks: 0; all twists verified and non-isomorphic: True; dual pairs among them: 0; pairs of quandles: 0
  non-self-dual racks: 0; of these not twist-related to their dual: 0
  time 0.0s
n=2: labelled racks 2, isomorphism classes 2  (0.0s)
  B3-classes (= twist classes): 2; groups with >1 rack: 0, sizes []
  unordered twist pairs of non-isomorphic racks: 0; all twists verified and non-isomorphic: True; dual pairs among them: 0; pairs of quandles: 0
  non-self-dual racks: 0; of these not twist-related to their dual: 0
  time 0.0s
n=3: labelled racks 13, isomorphism classes 6  (0.0s)
  B3-classes (= twist classes): 6; groups with >1 rack: 0, sizes []
  unordered twist pairs of non-isomorphic racks: 0; all twists verified and non-isomorphic: True; dual pairs among them: 0; pairs of quandles: 0
  non-self-dual racks: 0; of these not twist-related to their dual: 0
  time 0.0s
n=4: labelled racks 114, isomorphism classes 19  (0.0s)
  B3-classes (= twist classes): 19; groups with >1 rack: 0, sizes []
  unordered twist pairs of non-isomorphic racks: 0; all twists verified and non-isomorphic: True; dual pairs among them: 0; pairs of quandles: 0
  non-self-dual racks: 0; of these not twist-related to their dual: 0
  time 0.0s
n=5: labelled racks 1708, isomorphism classes 74  (0.2s)
  B3-classes (= twist classes): 73; groups with >1 rack: 1, sizes [2]
  unordered twist pairs of non-isomorphic racks: 1; all twists verified and non-isomorphic: True; dual pairs among them: 1; pairs of quandles: 1
  non-self-dual racks: 2; of these not twist-related to their dual: 0
  time 0.3s
