Young urn sequence (number of possible evolutions in n steps of the "Young" Pólya urn).
A293653
Young urn sequence (number of possible evolutions in n steps of the "Young" Pólya urn).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =30a(4) =180a(5) =1440a(6) =12960a(7) =142560a(8) =1710720a(9) =23950080a(10) =359251200a(11) =6107270400a(12) =109930867200
External references
- oeis: A293653