Number of permutations of an n-set containing a 4-cycle.
A029571
Number of permutations of an n-set containing a 4-cycle.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =6a(5) =30a(6) =180a(7) =1260a(8) =8820a(9) =79380a(10) =793800a(11) =8731800a(12) =106029000a(13) =1378377000a(14) =19297278000a(15) =289459170000
External references
- oeis: A029571