7210803600domain: NAppears in sequencesGroup the even numbers as (2,4), (6,8,10,12), (14,16,18,20,22,24), (26,28,30,32,34,36,38,40), ... then a(n) = LCM of the n-th group.at n=4A062081LCM of n-th group of terms in A074147.at n=9A082736