a(n) = [x^n] Product_{k=1..n} 1/(1 - (n - k + 1)*x^k).
A303175
a(n) = [x^n] Product_{k=1..n} 1/(1 - (n - k + 1)*x^k).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =34a(4) =322a(5) =3803a(6) =55297a(7) =953815a(8) =19086057a(9) =434477488a(10) =11086102633a(11) =313318606066
External references
- oeis: A303175