SymmetryBook: Order-3 subgroup count of symmetric groups is only correct up to n=5
Reported · info · Specification gap
The count n(n-1)(n-2)/6 of order-3 subgroups of symmetric groups is correct only for n up to 5. The symmetric group on 6 points has 40 such subgroups, not 20, and the text also has a typo.
Found: ; reported: ; status since: . Reporter: Mike Murunov