a(n) = [x^n] Product_{k=1..n} 1/(x^(3*k)*(1-x^k)^2).
A258795
a(n) = [x^n] Product_{k=1..n} 1/(x^(3*k)*(1-x^k)^2).
Terms
- a(0) =1a(1) =5a(2) =112a(3) =3216a(4) =104112a(5) =3661517a(6) =136580866a(7) =5323418568a(8) =214685704402
External references
- oeis: A258795