Number of degree-n permutations of order dividing 6.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =18a(5) =66a(6) =396a(7) =2052a(8) =12636a(9) =91548a(10) =625176a(11) =4673736a(12) =43575192a(13) =377205336a(14) =3624289488a(15) =38829340656a(16) =397695226896