a(n) = Sum_{k=0..n} abs(Stirling1(n,k)) * Stirling2(n,n-k).
A384501
a(n) = Sum_{k=0..n} abs(Stirling1(n,k)) * Stirling2(n,n-k).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =9a(4) =119a(5) =2025a(6) =42510a(7) =1062761a(8) =30854159a(9) =1020615912a(10) =37900765365
External references
- oeis: A384501