With a(1) = 1, a(n) is the LCM of all 0 < m < n for which a(m) divides n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =2a(5) =60a(6) =2a(7) =210a(8) =2a(9) =630a(10) =2a(11) =13860a(12) =2a(13) =90090a(14) =2a(15) =90090a(16) =2a(17) =3063060a(18) =2a(19) =29099070a(20) =2a(21) =29099070a(22) =2a(23) =1338557220a(24) =2a(25) =3346393050a(26) =2a(27) =10039179150a(28) =2a(29) =582272390700