370945575

Appears in sequences

• Number of permutations in the symmetric group S_n that have even order.at n=12A059838
• a(n) is the number of permutations in the symmetric group S_n that contain an odd cycle.at n=12A087137
• a(n) = n! - ((n-1)!!)^2.at n=10A088979
• a(n) = (2*n)! - ((2*n-1)!!)^2.at n=6A151816