Number of endofunctions on [2n] with exactly n cycles.
A273442
Number of endofunctions on [2n] with exactly n cycles.
Terms
- a(0) =1a(1) =3a(2) =95a(3) =5595a(4) =484729a(5) =55545735a(6) =7923937307
External references
- oeis: A273442
A273442
Number of endofunctions on [2n] with exactly n cycles.