Semiprimes in A103374.

Terms

a(0) =4a(1) =9a(2) =15a(3) =21a(4) =33a(5) =38a(6) =58a(7) =65a(8) =86a(9) =106a(10) =121a(11) =129a(12) =265a(13) =979a(14) =1079a(15) =2279a(16) =7985a(17) =8491a(18) =14019a(19) =15397a(20) =37606a(21) =61289a(22) =71845a(23) =117013a(24) =127401a(25) =196763a(26) =221905a(27) =244414a(28) =265358a(29) =290111