a(n) = 5^(2*n) * [x^n] Product_{k>=1} (1 + 3*x^k)^(1/5).
A370739
a(n) = 5^(2*n) * [x^n] Product_{k>=1} (1 + 3*x^k)^(1/5).
Terms
- a(0) =1a(1) =15a(2) =-75a(3) =35250a(4) =-1138125a(5) =72645000a(6) =-3307996875a(7) =244578890625
External references
- oeis: A370739