Sum over the products of factorials of parts in all partitions of n where the sum runs over the number of different parts only.
A107894
Sum over the products of factorials of parts in all partitions of n where the sum runs over the number of different parts only.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =35a(5) =167a(6) =943a(7) =6379a(8) =48945a(9) =429651a(10) =4189865a(11) =45307601a(12) =535518109a(13) =6883110373a(14) =95435065935
External references
- oeis: A107894