a(n) = (Sum_{k=1..n} 1/c(k))*(Product_{j=1..n} c(j)), where c(j) is the j-th composite.
A110957
a(n) = (Sum_{k=1..n} 1/c(k))*(Product_{j=1..n} c(j)), where c(j) is the j-th composite.
Terms
- a(0) =1a(1) =10a(2) =104a(3) =1128a(4) =13008a(5) =173376a(6) =2634624a(7) =42422400a(8) =722304000a(9) =13698201600a(10) =286505164800
External references
- oeis: A110957