Triangular array read by rows: T(n,k) is the number of partial permutations of {1,2,...,n} that have exactly k cycles, 0<=k<=n.
A216294
Triangular array read by rows: T(n,k) is the number of partial permutations of {1,2,...,n} that have exactly k cycles, 0<=k<=n.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =1a(6) =13a(7) =14a(8) =6a(9) =1a(10) =73a(11) =84a(12) =41a(13) =10a(14) =1a(15) =501a(16) =609a(17) =325a(18) =95a(19) =15a(20) =1a(21) =4051a(22) =5155a(23) =2944a(24) =965a(25) =190a(26) =21a(27) =1a(28) =37633a(29) =49790
External references
- oeis: A216294