a(1)=1. a(n) is the smallest positive multiple of n that has more divisors than a(n-1) has.

Terms

a(0) =1a(1) =2a(2) =6a(3) =12a(4) =30a(5) =36a(6) =84a(7) =120a(8) =180a(9) =240a(10) =660a(11) =720a(12) =1560a(13) =1260a(14) =1680a(15) =2880a(16) =6120a(17) =5040a(18) =15960a(19) =10080a(20) =15120a(21) =27720a(22) =115920a(23) =83160a(24) =138600a(25) =196560a(26) =302400a(27) =277200a(28) =803880a(29) =498960