a(n) = (1/n!)* Sum_{k=0..n} |Stirling1(n,k)|*A122399(k).
A121886
a(n) = (1/n!)* Sum_{k=0..n} |Stirling1(n,k)|*A122399(k).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =40a(4) =444a(5) =6324a(6) =110023a(7) =2261576a(8) =53632424a(9) =1441341350a(10) =43290170494
External references
- oeis: A121886