Number of permutations of [n] such that the number of cycles of length k is zero or a divisor of k for every k.
A374292
Number of permutations of [n] such that the number of cycles of length k is zero or a divisor of k for every k.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =17a(5) =89a(6) =474a(7) =3324a(8) =28440a(9) =253448a(10) =2476700a(11) =26876420a(12) =328110540a(13) =4207321260a(14) =58468831680a(15) =877439227560
External references
- oeis: A374292