Semiprimes in A072226.

Terms

a(0) =4a(1) =6a(2) =9a(3) =10a(4) =14a(5) =15a(6) =22a(7) =26a(8) =33a(9) =34a(10) =38a(11) =46a(12) =49a(13) =62a(14) =65a(15) =69a(16) =77a(17) =85a(18) =86a(19) =93a(20) =122a(21) =129a(22) =133a(23) =145a(24) =158a(25) =202a(26) =254a(27) =334a(28) =382a(29) =398