Number of permutations of 3*n objects with exactly 2*n cycles.
A384129
Number of permutations of 3*n objects with exactly 2*n cycles.
Terms
- a(0) =1a(1) =3a(2) =85a(3) =4536a(4) =357423a(5) =37312275a(6) =4853222764a(7) =756111184500
External references
- oeis: A384129