For n>3, a(n) = smallest number divisible by exactly n-2 previous terms; a(n)=n for n<=3.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =18a(6) =12a(7) =24a(8) =36a(9) =108a(10) =72a(11) =144a(12) =216a(13) =648a(14) =432a(15) =864a(16) =1296a(17) =3888a(18) =2592a(19) =5184a(20) =7776a(21) =23328a(22) =15552a(23) =31104a(24) =46656a(25) =139968a(26) =93312a(27) =186624a(28) =279936a(29) =839808