Lcm[{ad(n)}], i.e. the least common multiple of the anti-divisors of n.

Terms

a(0) =2a(1) =3a(2) =6a(3) =4a(4) =30a(5) =15a(6) =6a(7) =84a(8) =42a(9) =40a(10) =90a(11) =36a(12) =30a(13) =33a(14) =2310a(15) =420a(16) =78a(17) =312a(18) =42a(19) =180a(20) =90a(21) =112a(22) =3570a(23) =204a(24) =990a(25) =25080a(26) =114a(27) =60a(28) =126a(29) =4095