Number of factorizations of permutations of n letters into ordered cycles.
A007840
Number of factorizations of permutations of n letters into ordered cycles.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =14a(4) =88a(5) =694a(6) =6578a(7) =72792a(8) =920904a(9) =13109088a(10) =207360912a(11) =3608233056a(12) =68495486640
External references
- oeis: A007840