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

Terms

a(0) =1a(1) =2a(2) =5a(3) =8a(4) =9a(5) =13a(6) =14a(7) =17a(8) =21a(9) =22a(10) =25a(11) =26a(12) =29a(13) =32a(14) =33a(15) =37a(16) =38a(17) =41a(18) =45a(19) =48a(20) =49a(21) =53a(22) =56a(23) =57a(24) =61a(25) =62a(26) =65a(27) =69a(28) =70a(29) =73