Number of permutations of {1,2,...,3n} whose cycle lengths are all divisible by 3.

A178575

Number of permutations of {1,2,...,3n} whose cycle lengths are all divisible by 3.

Terms

    a(0) =1a(1) =2a(2) =160a(3) =62720a(4) =68992000a(5) =163235072000

External references