a(n) = [x^n] Product_{k>=1} ((1 + x^k)/(1 - x^k))^sigma_n(k).
A321057
a(n) = [x^n] Product_{k>=1} ((1 + x^k)/(1 - x^k))^sigma_n(k).
Terms
- a(0) =1a(1) =2a(2) =12a(3) =94a(4) =1522a(5) =48154a(6) =3087600a(7) =377880794a(8) =93356591804
External references
- oeis: A321057