a(n) = lcm(A066840(n), A124440(n)).

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =21a(5) =5a(6) =30a(7) =12a(8) =140a(9) =16a(10) =120a(11) =18a(12) =399a(13) =99a(14) =322a(15) =48a(16) =900a(17) =533a(18) =630a(19) =60a(20) =480a(21) =425a(22) =1122a(23) =72a(24) =11781a(25) =360a(26) =11102a(27) =126a(28) =4515a(29) =352