Number of endofunctions on [n] whose cycle lengths are divisors of 4.

A246524

Number of endofunctions on [n] whose cycle lengths are divisors of 4.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =25a(4) =224a(5) =2601a(6) =37072a(7) =626137a(8) =12227280a(9) =271086625a(10) =6727858496a(11) =184818121929

External references