a(n) = core(1)*core(2)*...*core(n) where core(n) is the squarefree part of n (A007913).
A069260
a(n) = core(1)*core(2)*...*core(n) where core(n) is the squarefree part of n (A007913).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =6a(4) =30a(5) =180a(6) =1260a(7) =2520a(8) =2520a(9) =25200a(10) =277200a(11) =831600a(12) =10810800a(13) =151351200a(14) =2270268000a(15) =2270268000a(16) =38594556000a(17) =77189112000
External references
- oeis: A069260