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

A273996

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

Terms

    a(0) =1a(1) =1a(2) =4a(3) =25a(4) =218a(5) =2451a(6) =33952a(7) =560407a(8) =10750140a(9) =235118665a(10) =5775676496a(11) =157448312649

External references