1712845

Appears in sequences

• Array T(n,k) = number of conjugacy classes of subgroups of index k in free group of rank n, read by antidiagonals.at n=32A057004
• Number of conjugacy classes of subgroups of index n in free group of rank 4.at n=4A057007
• Number of conjugacy classes of subgroups of index 5 in free group of rank n.at n=3A057011