Number of derangements on n elements with an odd number of cycles.
A216779
Number of derangements on n elements with an odd number of cycles.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =2a(4) =6a(5) =24a(6) =135a(7) =930a(8) =7420a(9) =66752a(10) =667485a(11) =7342290a(12) =88107426a(13) =1145396472a(14) =16035550531a(15) =240533257874
External references
- oeis: A216779