Cardinality of the ramified symmetric inverse monoid R(IS_n).
A378232
Cardinality of the ramified symmetric inverse monoid R(IS_n).
Terms
- a(0) =1a(1) =3a(2) =39a(3) =971a(4) =38140a(5) =2126890a(6) =157874467a(7) =14928602309
External references
- oeis: A378232