a(n) = numerator of Product_{k=1..n} k^mu(k), where mu(k) = A008683(k).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =2a(10) =2a(11) =2a(12) =2a(13) =4a(14) =60a(15) =60a(16) =60a(17) =60a(18) =60a(19) =60a(20) =1260a(21) =2520a(22) =2520a(23) =2520a(24) =2520a(25) =5040a(26) =5040a(27) =5040a(28) =5040a(29) =168