a(n) = [x^n] Product_{k=1..n} 1/(x^(3*k)*(1-x^k)).
A258790
a(n) = [x^n] Product_{k=1..n} 1/(x^(3*k)*(1-x^k)).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =48a(4) =411a(5) =3765a(6) =36308a(7) =363446a(8) =3742085a(9) =39405777a(10) =422669224a(11) =4603472960a(12) =50790334667a(13) =566603884871
External references
- oeis: A258790