Products of exactly two distinct odd primes in A090252, in order of appearance.

Terms

a(0) =21a(1) =55a(2) =85a(3) =57a(4) =161a(5) =319a(6) =217a(7) =481a(8) =205a(9) =731a(10) =517a(11) =159a(12) =1121a(13) =1403a(14) =871a(15) =355a(16) =1241a(17) =869a(18) =2407a(19) =1691a(20) =413a(21) =3007a(22) =2323a(23) =1391a(24) =4033a(25) =565a(26) =5207a(27) =2227a(28) =5891a(29) =6533