Number of permutations of [n] such that the element sum of each cycle is odd.
A369080
Number of permutations of [n] such that the element sum of each cycle is odd.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =6a(5) =36a(6) =180a(7) =1080a(8) =7560a(9) =75600a(10) =680400a(11) =6804000a(12) =74844000a(13) =1047816000a(14) =13621608000a(15) =190702512000
External references
- oeis: A369080