Number of functions f: {1,2,...,n} -> {1,2,...,n} with even cycles only.
A060435
Number of functions f: {1,2,...,n} -> {1,2,...,n} with even cycles only.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =6a(4) =57a(5) =680a(6) =9945a(7) =172032a(8) =3438673a(9) =78003648a(10) =1980083025a(11) =55616359040
External references
- oeis: A060435