Number of collections of nonempty multisets with a total of n+2 objects of exactly n colors.
A255952
Number of collections of nonempty multisets with a total of n+2 objects of exactly n colors.
Terms
- a(0) =0a(1) =3a(2) =23a(3) =141a(4) =848a(5) =5190a(6) =32835a(7) =216006a(8) =1480524a(9) =10574613a(10) =78652940a(11) =608539283a(12) =4891327374a(13) =40788987473a(14) =352412667201
External references
- oeis: A255952