a(n) = [x^n] 1/(1 - n*x) * Product_{k=0..n-1} (1 + k*x)/(1 - k*x).
A383839
a(n) = [x^n] 1/(1 - n*x) * Product_{k=0..n-1} (1 + k*x)/(1 - k*x).
Terms
- a(0) =1a(1) =1a(2) =10a(3) =177a(4) =4576a(5) =156145a(6) =6627006a(7) =336562177a(8) =19906794496
External references
- oeis: A383839