Number of endofunctions on [n] whose cycle lengths are multiples of 4.
A246611
Number of endofunctions on [n] whose cycle lengths are multiples of 4.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =6a(5) =120a(6) =2160a(7) =41160a(8) =866460a(9) =20294064a(10) =526680000a(11) =15036999120a(12) =468848156040
External references
- oeis: A246611