a(n+1) = next number having largest prime dividing a(n) as a factor, with a(1) = 2.

Terms

a(0) =2a(1) =4a(2) =6a(3) =9a(4) =12a(5) =15a(6) =20a(7) =25a(8) =30a(9) =35a(10) =42a(11) =49a(12) =56a(13) =63a(14) =70a(15) =77a(16) =88a(17) =99a(18) =110a(19) =121a(20) =132a(21) =143a(22) =156a(23) =169a(24) =182a(25) =195a(26) =208a(27) =221a(28) =238a(29) =255