On the number of equivalence classes of invertible Boolean functions under action of permutation of variables on domain and range

Let V-n be the number of equivalence classes of invertible maps from {0, 1}(n) to {0, 1}(n), under action of permutation of variables on domain and range. So far, the values V-n have been known for n <= 6. This paper describes the procedure by which the values of V-n are calculated for n <= 30.