Number of endofunctions on [n] whose cycle lengths are divisors of 3.

A246523

Number of endofunctions on [n] whose cycle lengths are divisors of 3.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =18a(4) =157a(5) =1776a(6) =24687a(7) =407464a(8) =7792857a(9) =169554240a(10) =4137133051a(11) =111912543744

External references