Numbers which are the product of two S-primes (A057948) in exactly three ways.

Terms

a(0) =4389a(1) =5313a(2) =7161a(3) =9177a(4) =9933a(5) =10857a(6) =12369a(7) =13629a(8) =14421a(9) =14973a(10) =15477a(11) =16401a(12) =17157a(13) =18249a(14) =18753a(15) =19173a(16) =19437a(17) =20769a(18) =22701a(19) =23529a(20) =23541a(21) =23793a(22) =24717a(23) =26733a(24) =26961a(25) =27993a(26) =28329a(27) =28497a(28) =29337a(29) =29469