a(n) = Sum_{j=0..n} p(n - j, j) where p(n, x) = Sum_{k=0..n} k! * abs(Stirling1(n, k)) * x^k.
A372349
a(n) = Sum_{j=0..n} p(n - j, j) where p(n, x) = Sum_{k=0..n} k! * abs(Stirling1(n, k)) * x^k.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =28a(5) =190a(6) =1730a(7) =20068a(8) =287406a(9) =4971884a(10) =102082882a(11) =2450448780a(12) =67879395878
External references
- oeis: A372349