Number of permutations of length n with 2 cycle lengths.
A005772
Number of permutations of length n with 2 cycle lengths.
Terms
- a(0) =3a(1) =14a(2) =95a(3) =424a(4) =3269a(5) =21202a(6) =178443a(7) =1622798a(8) =17064179a(9) =177093256a(10) =2293658861a(11) =29296367476a(12) =416567286225
External references
- oeis: A005772