Number of permutations on [n] admitting an eighth root.
A247006
Number of permutations on [n] admitting an eighth root.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =9a(5) =45a(6) =225a(7) =1575a(8) =11025a(9) =99225a(10) =893025a(11) =9823275a(12) =108056025a(13) =1404728325a(14) =18261468225a(15) =273922023375
External references
- oeis: A247006