Number of functions on n labeled points to themselves (endofunctions) such that the number of cycles of f that have each even size is even.

A212599

Number of functions on n labeled points to themselves (endofunctions) such that the number of cycles of f that have each even size is even.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =18a(4) =160a(5) =1875a(6) =27126a(7) =466186a(8) =9275064a(9) =209654325a(10) =5307031000a(11) =148720701426

External references