a(n) is the lcm of related numbers to n (counted in A073757): related = {divisor-set, RRS}.

Terms

a(0) =1a(1) =2a(2) =6a(3) =12a(4) =60a(5) =30a(6) =420a(7) =840a(8) =2520a(9) =630a(10) =27720a(11) =4620a(12) =360360a(13) =90090a(14) =120120a(15) =720720a(16) =12252240a(17) =1531530a(18) =232792560a(19) =58198140a(20) =77597520a(21) =29099070a(22) =5354228880a(23) =892371480a(24) =26771144400a(25) =3346393050a(26) =80313433200a(27) =20078358300