a(n) is the smallest number that has exactly n evil divisors (A001969).

Terms

a(0) =1a(1) =3a(2) =6a(3) =12a(4) =18a(5) =45a(6) =30a(7) =135a(8) =72a(9) =60a(10) =90a(11) =765a(12) =120a(13) =1575a(14) =270a(15) =180a(16) =600a(17) =3465a(18) =480a(19) =13545a(20) =360a(21) =540a(22) =1530a(23) =10395a(24) =1260a(25) =720a(26) =3150a(27) =1980a(28) =1080a(29) =49725