LCM of numbers m such that 1 <= m <= n, m has a common factor with n, but m does not divide n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =4a(6) =1a(7) =6a(8) =6a(9) =24a(10) =1a(11) =360a(12) =1a(13) =120a(14) =180a(15) =420a(16) =1a(17) =1680a(18) =1a(19) =5040a(20) =1260a(21) =5040a(22) =1a(23) =55440a(24) =60a(25) =55440a(26) =2520a(27) =720720a(28) =1a(29) =10810800