Number of permutations of [n] having only cycles with at least 3 alternating runs (it is assumed that the smallest element of the cycle is in the first position).
A187248
Number of permutations of [n] having only cycles with at least 3 alternating runs (it is assumed that the smallest element of the cycle is in the first position).
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =2a(5) =16a(6) =104a(7) =688a(8) =5116a(9) =44224a(10) =438560a(11) =4851136a(12) =58603544a(13) =764606016a(14) =10715043104a(15) =160692920256
External references
- oeis: A187248