a(1) = 1, a(n) = a(n-1) times largest divisor of n <= n^(1/2).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =4a(7) =8a(8) =24a(9) =48a(10) =48a(11) =144a(12) =144a(13) =288a(14) =864a(15) =3456a(16) =3456a(17) =10368a(18) =10368a(19) =41472a(20) =124416a(21) =248832a(22) =248832a(23) =995328a(24) =4976640a(25) =9953280a(26) =29859840a(27) =119439360a(28) =119439360a(29) =597196800