a(n) = product of divisors d of n that are not coreful.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =6a(6) =1a(7) =1a(8) =1a(9) =10a(10) =1a(11) =24a(12) =1a(13) =14a(14) =15a(15) =1a(16) =1a(17) =54a(18) =1a(19) =40a(20) =21a(21) =22a(22) =1a(23) =192a(24) =1a(25) =26a(26) =1a(27) =56a(28) =1a(29) =27000