For n > 3, a(n) = a(n-3) + lcm(a(n-3), n-2) with a(1)=6, a(2)=6, a(3)=6.

Terms

a(0) =6a(1) =6a(2) =6a(3) =12a(4) =12a(5) =18a(6) =72a(7) =24a(8) =144a(9) =144a(10) =96a(11) =864a(12) =1728a(13) =192a(14) =12096a(15) =13824a(16) =1152a(17) =24192a(18) =248832a(19) =2304a(20) =483840a(21) =1492992a(22) =18432a(23) =5806080a(24) =35831808a(25) =36864a(26) =34836480a(27) =501645312a(28) =147456a(29) =69672960