Sum of products of factorials of parts times the factorial of the number of parts in all integer partitions of n.
A160564
Sum of products of factorials of parts times the factorial of the number of parts in all integer partitions of n.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =16a(4) =80a(5) =420a(6) =2592a(7) =17352a(8) =132240a(9) =1117200a(10) =10559040a(11) =110276352a(12) =1268640000a(13) =15923168640a(14) =216767367936
External references
- oeis: A160564