a(n) is the coefficient of y^(n-1) in Product_{k=0..n-2} (n + (n + k)*y + n*y^2), for n >= 1.
A324957
a(n) is the coefficient of y^(n-1) in Product_{k=0..n-2} (n + (n + k)*y + n*y^2), for n >= 1.
Terms
- a(0) =1a(1) =2a(2) =30a(3) =600a(4) =17980a(5) =701280a(6) =33904822a(7) =1956209024a(8) =131229583596
External references
- oeis: A324957