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

Terms

a(0) =2a(1) =2a(2) =4a(3) =8a(4) =8a(5) =48a(6) =32a(7) =384a(8) =64a(9) =1536a(10) =384a(11) =18432a(12) =768a(13) =258048a(14) =6144a(15) =1548288a(16) =12288a(17) =27869184a(18) =49152a(19) =557383680a(20) =294912a(21) =1114767360a(22) =3538944a(23) =26754416640a(24) =7077888a(25) =160526499840a(26) =99090432a(27) =321052999680a(28) =198180864a(30) =1189085184