a(n) = least positive integer > a(n-1) and not a(i)*a(j)-1 for 1<=i<j<=n, with initial terms 2,3.

Terms

a(0) =2a(1) =3a(2) =4a(3) =6a(4) =8a(5) =9a(6) =10a(7) =12a(8) =13a(9) =14a(10) =16a(11) =18a(12) =20a(13) =21a(14) =22a(15) =24a(16) =28a(17) =30a(18) =32a(19) =33a(20) =34a(21) =36a(22) =37a(23) =40a(24) =42a(25) =44a(26) =45a(27) =46a(28) =48a(29) =49