a(n) = n! * A000110(n) where A000110 is the sequence of Bell numbers.
A137341
a(n) = n! * A000110(n) where A000110 is the sequence of Bell numbers.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =30a(4) =360a(5) =6240a(6) =146160a(7) =4420080a(8) =166924800a(9) =7673823360a(10) =420850080000
External references
- oeis: A137341