a(1) = 1, a(n+1)= a(n)*(n+1) divided by the largest prime divisor of n+1.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =4a(7) =16a(8) =48a(9) =96a(10) =96a(11) =384a(12) =384a(13) =768a(14) =2304a(15) =18432a(16) =18432a(17) =110592a(18) =110592a(19) =442368a(20) =1327104a(21) =2654208a(22) =2654208a(23) =21233664a(24) =106168320a(25) =212336640a(26) =1911029760a(27) =7644119040a(28) =7644119040a(29) =45864714240