The number of functions f:{1,2,...,n}->{1,2,...,n} that have an odd number of odd length cycles and no even length cycles.
A202013
The number of functions f:{1,2,...,n}->{1,2,...,n} that have an odd number of odd length cycles and no even length cycles.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =12a(4) =100a(5) =1120a(6) =15606a(7) =260344a(8) =5056136a(9) =112026240a(10) =2788230250a(11) =77009739136
External references
- oeis: A202013