Number of labeled rooted identity trees on n nodes (rooted trees that admit n! labelings).
A228159
Number of labeled rooted identity trees on n nodes (rooted trees that admit n! labelings).
Terms
- a(0) =0a(1) =1a(2) =2a(3) =6a(4) =48a(5) =360a(6) =4320a(7) =60480a(8) =1008000a(9) =18869760a(10) =410054400a(11) =9859449600a(12) =262492876800
External references
- oeis: A228159