a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for i<=1<=j<=n.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =7a(5) =9a(6) =13a(7) =15a(8) =19a(9) =21a(10) =24a(11) =25a(12) =26a(13) =31a(14) =33a(15) =34a(16) =35a(17) =36a(18) =39a(19) =42a(20) =43a(21) =45a(22) =46a(23) =48a(24) =49a(25) =53a(26) =55a(27) =56a(28) =57a(29) =58