a(n) = Sum_{k=1..n} J_n(k), where J is the Jordan function, J_n(k) = k^n * Product_{p|k, p prime} (1 - 1/p^n).
A332617
a(n) = Sum_{k=1..n} J_n(k), where J is the Jordan function, J_n(k) = k^n * Product_{p|k, p prime} (1 - 1/p^n).
Terms
- a(0) =1a(1) =4a(2) =34a(3) =336a(4) =4390a(5) =66312a(6) =1197858a(7) =24612000a(8) =574002448a(9) =14903406552a(10) =427622607366
External references
- oeis: A332617