a(n) = Product_{p prime, p <= n} floor(n/p).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =6a(7) =6a(8) =8a(9) =12a(10) =30a(11) =30a(12) =48a(13) =48a(14) =112a(15) =210a(16) =240a(17) =240a(18) =324a(19) =324a(20) =480a(21) =840a(22) =1848a(23) =1848a(24) =2304a(25) =2880a(26) =6240a(27) =7020a(28) =10080a(29) =10080