Least common multiple of {2, 4, 6, ..., 2n}.

Terms

a(0) =2a(1) =4a(2) =12a(3) =24a(4) =120a(5) =120a(6) =840a(7) =1680a(8) =5040a(9) =5040a(10) =55440a(11) =55440a(12) =720720a(13) =720720a(14) =720720a(15) =1441440a(16) =24504480a(17) =24504480a(18) =465585120a(19) =465585120a(20) =465585120a(21) =465585120a(22) =10708457760a(23) =10708457760a(24) =53542288800a(25) =53542288800a(26) =160626866400a(27) =160626866400