Number of permutations of [n] whose cycle lengths are factorials.

A272603

Number of permutations of [n] whose cycle lengths are factorials.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =26a(6) =196a(7) =1072a(8) =7484a(9) =42940a(10) =261496a(11) =1477136a(12) =15219832a(13) =134828344a(14) =1488515120a(15) =13692017536a(16) =130252442896

External references