a(n) = [x^n] Product_{k=0..n} (1 + (n+k)*x).
A384024
a(n) = [x^n] Product_{k=0..n} (1 + (n+k)*x).
Terms
- a(0) =1a(1) =3a(2) =26a(3) =342a(4) =5944a(5) =127860a(6) =3272688a(7) =97053936a(8) =3270729600a(9) =123418922400
External references
- oeis: A384024