a(n) = [x^n] 1/Product_{k=0..n} (1 - (n+k)*x).
A383869
a(n) = [x^n] 1/Product_{k=0..n} (1 - (n+k)*x).
Terms
- a(0) =1a(1) =3a(2) =55a(3) =1890a(4) =95781a(5) =6427575a(6) =537306484a(7) =53791898160
External references
- oeis: A383869
A383869
a(n) = [x^n] 1/Product_{k=0..n} (1 - (n+k)*x).