Number of preferential arrangements of n labeled elements where the exchange of elements among the levels is restricted to levels of different occupation numbers.
A122404
Number of preferential arrangements of n labeled elements where the exchange of elements among the levels is restricted to levels of different occupation numbers.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =8a(4) =25a(5) =102a(6) =619a(7) =3012a(8) =17210a(9) =100980a(10) =796797a(11) =5350138a(12) =41054864a(13) =313424464a(14) =2545451783a(15) =23433207732a(16) =206742504343
External references
- oeis: A122404