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

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =7a(5) =10a(6) =11a(7) =15a(8) =18a(9) =19a(10) =25a(11) =26a(12) =29a(13) =30a(14) =33a(15) =34a(16) =37a(17) =41a(18) =42a(19) =45a(20) =46a(21) =49a(22) =50a(23) =53a(24) =57a(25) =58a(26) =61a(27) =64a(28) =65a(29) =69